123620634137 has 16 divisors (see below), whose sum is σ = 165980153472. Its totient is φ = 88917937920.

The previous prime is 123620634131. The next prime is 123620634161. The reversal of 123620634137 is 731436026321.

It is a de Polignac number, because none of the positive numbers 2^k-123620634137 is a prime.

It is a super-2 number, since 2×123620634137² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 123620634137.

It is not an unprimeable number, because it can be changed into a prime (123620634131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61747568 + ... + 61749569.

It is an arithmetic number, because the mean of its divisors is an integer number (10373759592).

Almost surely, 2^123620634137 is an apocalyptic number.

It is an amenable number.

123620634137 is a deficient number, since it is larger than the sum of its proper divisors (42359519335).

123620634137 is a wasteful number, since it uses less digits than its factorization.

123620634137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123497168.

The product of its (nonzero) digits is 108864, while the sum is 38.

It can be divided in two parts, 123620 and 634137, that added together give a palindrome (757757).

The spelling of 123620634137 in words is "one hundred twenty-three billion, six hundred twenty million, six hundred thirty-four thousand, one hundred thirty-seven".