68644490700 has 36 divisors (see below), whose sum is σ = 198611393960. Its totient is φ = 18305197440.

The previous prime is 68644490693. The next prime is 68644490729. The reversal of 68644490700 is 709444686.

It is a super-2 number, since 2×68644490700² (a number of 22 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 68644490700.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 114407185 + ... + 114407784.

Almost surely, 2^68644490700 is an apocalyptic number.

68644490700 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

68644490700 is an abundant number, since it is smaller than the sum of its proper divisors (129966903260).

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

68644490700 is a wasteful number, since it uses less digits than its factorization.

68644490700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228814986 (or 228814979 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 48.

The spelling of 68644490700 in words is "sixty-eight billion, six hundred forty-four million, four hundred ninety thousand, seven hundred".