651630688938 has 48 divisors (see below), whose sum is σ = 1431069319680. Its totient is φ = 214270541568.

The previous prime is 651630688937. The next prime is 651630688939. The reversal of 651630688938 is 839886036156.

651630688938 is a `hidden beast` number, since 6 + 516 + 3 + 0 + 6 + 8 + 89 + 38 = 666.

It is an interprime number because it is at equal distance from previous prime (651630688937) and next prime (651630688939).

It is not an unprimeable number, because it can be changed into a prime (651630688937) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 71818 + ... + 1143861.

It is an arithmetic number, because the mean of its divisors is an integer number (29813944160).

Almost surely, 2^651630688938 is an apocalyptic number.

651630688938 is an abundant number, since it is smaller than the sum of its proper divisors (779438630742).

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

651630688938 is a wasteful number, since it uses less digits than its factorization.

651630688938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1216091 (or 1216088 counting only the distinct ones).

The product of its (nonzero) digits is 44789760, while the sum is 63.

The spelling of 651630688938 in words is "six hundred fifty-one billion, six hundred thirty million, six hundred eighty-eight thousand, nine hundred thirty-eight".