68581565364 has 24 divisors (see below), whose sum is σ = 172333164640. Its totient is φ = 21102020064.

The previous prime is 68581565341. The next prime is 68581565369. The reversal of 68581565364 is 46356518586.

It is a super-2 number, since 2×68581565364² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68581565369) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 219812554 + ... + 219812865.

Almost surely, 2^68581565364 is an apocalyptic number.

It is an amenable number.

68581565364 is an abundant number, since it is smaller than the sum of its proper divisors (103751599276).

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

68581565364 is a wasteful number, since it uses less digits than its factorization.

68581565364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439625439 (or 439625437 counting only the distinct ones).

The product of its digits is 20736000, while the sum is 57.

The spelling of 68581565364 in words is "sixty-eight billion, five hundred eighty-one million, five hundred sixty-five thousand, three hundred sixty-four".