68390791504 has 40 divisors (see below), whose sum is σ = 152365853120. Its totient is φ = 29130513408.

The previous prime is 68390791477. The next prime is 68390791531. The reversal of 68390791504 is 40519709386.

It is a happy number.

68390791504 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (68390791477) and next prime (68390791531).

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, 1854849 + ... + 1891360.

It is an arithmetic number, because the mean of its divisors is an integer number (3809146328).

Almost surely, 2^68390791504 is an apocalyptic number.

It is an amenable number.

68390791504 is an abundant number, since it is smaller than the sum of its proper divisors (83975061616).

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

68390791504 is a wasteful number, since it uses less digits than its factorization.

68390791504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3746387 (or 3746381 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 52.

The spelling of 68390791504 in words is "sixty-eight billion, three hundred ninety million, seven hundred ninety-one thousand, five hundred four".