637940860623 has 12 divisors (see below), whose sum is σ = 1005240144168. Its totient is φ = 386630824560.

The previous prime is 637940860589. The next prime is 637940860651. The reversal of 637940860623 is 326068049736.

637940860623 is a `hidden beast` number, since 6 + 3 + 7 + 9 + 4 + 0 + 8 + 6 + 0 + 623 = 666.

It is not a de Polignac number, because 637940860623 - 2⁶ = 637940860559 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 637940860623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (637940860693) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3221923440 + ... + 3221923637.

It is an arithmetic number, because the mean of its divisors is an integer number (83770012014).

Almost surely, 2^637940860623 is an apocalyptic number.

637940860623 is a deficient number, since it is larger than the sum of its proper divisors (367299283545).

637940860623 is a wasteful number, since it uses less digits than its factorization.

637940860623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6443847094 (or 6443847091 counting only the distinct ones).

The product of its (nonzero) digits is 7838208, while the sum is 54.

The spelling of 637940860623 in words is "six hundred thirty-seven billion, nine hundred forty million, eight hundred sixty thousand, six hundred twenty-three".