68537438752 has 48 divisors (see below), whose sum is σ = 136962939960. Its totient is φ = 33754447872.

The previous prime is 68537438747. The next prime is 68537438771. The reversal of 68537438752 is 25783473586.

It can be written as a sum of positive squares in 4 ways, for example, as 62718190096 + 5819248656 = 250436^2 + 76284^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1777308 + ... + 1815460.

Almost surely, 2^68537438752 is an apocalyptic number.

It is an amenable number.

68537438752 is a deficient number, since it is larger than the sum of its proper divisors (68425501208).

68537438752 is a wasteful number, since it uses less digits than its factorization.

68537438752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39005 (or 38997 counting only the distinct ones).

The product of its digits is 33868800, while the sum is 58.

The spelling of 68537438752 in words is "sixty-eight billion, five hundred thirty-seven million, four hundred thirty-eight thousand, seven hundred fifty-two".