64624845081 has 16 divisors (see below), whose sum is σ = 86289356160. Its totient is φ = 43021829760.

The previous prime is 64624845059. The next prime is 64624845097. The reversal of 64624845081 is 18054842646.

64624845081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 64624845081 - 2⁹ = 64624844569 is a prime.

It is a super-2 number, since 2×64624845081² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 64624845081.

It is not an unprimeable number, because it can be changed into a prime (64624845011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7440061 + ... + 7448741.

It is an arithmetic number, because the mean of its divisors is an integer number (5393084760).

Almost surely, 2^64624845081 is an apocalyptic number.

It is an amenable number.

64624845081 is a deficient number, since it is larger than the sum of its proper divisors (21664511079).

64624845081 is a wasteful number, since it uses less digits than its factorization.

64624845081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11936.

The product of its (nonzero) digits is 1474560, while the sum is 48.

The spelling of 64624845081 in words is "sixty-four billion, six hundred twenty-four million, eight hundred forty-five thousand, eighty-one".