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26640400400 = 2452242327487
BaseRepresentation
bin11000110011111001…
…000100000000010000
32112202121121120010022
4120303321010000100
5414024420303100
620123300123012
71632113444555
oct306371040020
975677546108
1026640400400
11103308a2139
1251b5996468
132687346143
14140a196a2c
15a5dc01e85
hex633e44010

26640400400 has 60 divisors (see below), whose sum is σ = 64032306432. Its totient is φ = 10651374720.

The previous prime is 26640400393. The next prime is 26640400427. The reversal of 26640400400 is 400404662.

It is a self number, because there is not a number n which added to its sum of digits gives 26640400400.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 955457 + ... + 982943.

Almost surely, 226640400400 is an apocalyptic number.

26640400400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26640400400 is an abundant number, since it is smaller than the sum of its proper divisors (37391906032).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

26640400400 is a wasteful number, since it uses less digits than its factorization.

26640400400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29928 (or 29917 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

The spelling of 26640400400 in words is "twenty-six billion, six hundred forty million, four hundred thousand, four hundred".

Divisors: 1 2 4 5 8 10 16 20 25 40 50 80 100 200 400 2423 4846 9692 12115 19384 24230 27487 38768 48460 54974 60575 96920 109948 121150 137435 193840 219896 242300 274870 439792 484600 549740 687175 969200 1099480 1374350 2198960 2748700 5497400 10994800 66601001 133202002 266404004 333005005 532808008 666010010 1065616016 1332020020 1665025025 2664040040 3330050050 5328080080 6660100100 13320200200 26640400400