26638701340 has 12 divisors (see below), whose sum is σ = 55941272856. Its totient is φ = 10655480528.

The previous prime is 26638701301. The next prime is 26638701389. The reversal of 26638701340 is 4310783662.

It is a junction number, because it is equal to n+sod(n) for n = 26638701293 and 26638701302.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 665967514 + ... + 665967553.

It is an arithmetic number, because the mean of its divisors is an integer number (4661772738).

Almost surely, 2^26638701340 is an apocalyptic number.

26638701340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26638701340 is an abundant number, since it is smaller than the sum of its proper divisors (29302571516).

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

26638701340 is a wasteful number, since it uses less digits than its factorization.

26638701340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1331935076 (or 1331935074 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 40.

The spelling of 26638701340 in words is "twenty-six billion, six hundred thirty-eight million, seven hundred one thousand, three hundred forty".