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18148707680 = 255176672319
BaseRepresentation
bin10000111001101111…
…110100110101100000
31201211210222212121112
4100321233310311200
5244132032121210
612200513442452
71211512320125
oct207157646540
951753885545
1018148707680
117773521774
123625b70428
131932c991ac
14c4249a74c
1571347ed05
hex439bf4d60

18148707680 has 48 divisors (see below), whose sum is σ = 45398465280. Its totient is φ = 6832453632.

The previous prime is 18148707677. The next prime is 18148707701. The reversal of 18148707680 is 8670784181.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3333440 + ... + 3338879.

It is an arithmetic number, because the mean of its divisors is an integer number (945801360).

Almost surely, 218148707680 is an apocalyptic number.

18148707680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18148707680 is an abundant number, since it is smaller than the sum of its proper divisors (27249757600).

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

18148707680 is a wasteful number, since it uses less digits than its factorization.

18148707680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6672351 (or 6672343 counting only the distinct ones).

The product of its (nonzero) digits is 602112, while the sum is 50.

The spelling of 18148707680 in words is "eighteen billion, one hundred forty-eight million, seven hundred seven thousand, six hundred eighty".

Divisors: 1 2 4 5 8 10 16 17 20 32 34 40 68 80 85 136 160 170 272 340 544 680 1360 2720 6672319 13344638 26689276 33361595 53378552 66723190 106757104 113429423 133446380 213514208 226858846 266892760 453717692 533785520 567147115 907435384 1067571040 1134294230 1814870768 2268588460 3629741536 4537176920 9074353840 18148707680