68129646990 has 32 divisors (see below), whose sum is σ = 164958162336. Its totient is φ = 18007127040.

The previous prime is 68129646983. The next prime is 68129647009. The reversal of 68129646990 is 9964692186.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10045231 + ... + 10052010.

It is an arithmetic number, because the mean of its divisors is an integer number (5154942573).

Almost surely, 2^68129646990 is an apocalyptic number.

68129646990 is an abundant number, since it is smaller than the sum of its proper divisors (96828515346).

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

68129646990 is a wasteful number, since it uses less digits than its factorization.

68129646990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20097364.

The product of its (nonzero) digits is 10077696, while the sum is 60.

The spelling of 68129646990 in words is "sixty-eight billion, one hundred twenty-nine million, six hundred forty-six thousand, nine hundred ninety".