68321025537 has 32 divisors (see below), whose sum is σ = 94114234368. Its totient is φ = 44059329216.

The previous prime is 68321025517. The next prime is 68321025551. The reversal of 68321025537 is 73552012386.

It is a happy number.

It is not a de Polignac number, because 68321025537 - 2¹⁵ = 68320992769 is a prime.

It is a super-2 number, since 2×68321025537² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (68321025517) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10039378 + ... + 10046180.

It is an arithmetic number, because the mean of its divisors is an integer number (2941069824).

Almost surely, 2^68321025537 is an apocalyptic number.

It is an amenable number.

68321025537 is a deficient number, since it is larger than the sum of its proper divisors (25793208831).

68321025537 is a wasteful number, since it uses less digits than its factorization.

68321025537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7589.

The product of its (nonzero) digits is 302400, while the sum is 42.

The spelling of 68321025537 in words is "sixty-eight billion, three hundred twenty-one million, twenty-five thousand, five hundred thirty-seven".