68638870488 has 32 divisors (see below), whose sum is σ = 172486292400. Its totient is φ = 22761074688.

The previous prime is 68638870439. The next prime is 68638870493. The reversal of 68638870488 is 88407883686.

It is a super-2 number, since 2×68638870488² (a number of 22 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 7 ways as a sum of consecutive naturals, for example, 7404573 + ... + 7413836.

Almost surely, 2^68638870488 is an apocalyptic number.

It is an amenable number.

68638870488 is an abundant number, since it is smaller than the sum of its proper divisors (103847421912).

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

68638870488 is a wasteful number, since it uses less digits than its factorization.

68638870488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14818611 (or 14818607 counting only the distinct ones).

The product of its (nonzero) digits is 99090432, while the sum is 66.

The spelling of 68638870488 in words is "sixty-eight billion, six hundred thirty-eight million, eight hundred seventy thousand, four hundred eighty-eight".