137640287655 has 24 divisors (see below), whose sum is σ = 256928538048. Its totient is φ = 67761372096.

The previous prime is 137640287569. The next prime is 137640287731. The reversal of 137640287655 is 556782046731.

It is not a de Polignac number, because 137640287655 - 2⁸ = 137640287399 is a prime.

It is a super-2 number, since 2×137640287655² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 117640687 + ... + 117641856.

It is an arithmetic number, because the mean of its divisors is an integer number (10705355752).

Almost surely, 2^137640287655 is an apocalyptic number.

137640287655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

137640287655 is a deficient number, since it is larger than the sum of its proper divisors (119288250393).

137640287655 is a wasteful number, since it uses less digits than its factorization.

137640287655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235282567 (or 235282564 counting only the distinct ones).

The product of its (nonzero) digits is 8467200, while the sum is 54.

The spelling of 137640287655 in words is "one hundred thirty-seven billion, six hundred forty million, two hundred eighty-seven thousand, six hundred fifty-five".