64830912881 has 16 divisors (see below), whose sum is σ = 75320415744. Its totient is φ = 54652713984.

The previous prime is 64830912877. The next prime is 64830912941. The reversal of 64830912881 is 18821903846.

64830912881 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 64830912881 - 2² = 64830912877 is a prime.

It is a super-2 number, since 2×64830912881² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64830912841) 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, 680 + ... + 360086.

It is an arithmetic number, because the mean of its divisors is an integer number (4707525984).

Almost surely, 2^64830912881 is an apocalyptic number.

It is an amenable number.

64830912881 is a deficient number, since it is larger than the sum of its proper divisors (10489502863).

64830912881 is a wasteful number, since it uses less digits than its factorization.

64830912881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359840.

The product of its (nonzero) digits is 663552, while the sum is 50.

The spelling of 64830912881 in words is "sixty-four billion, eight hundred thirty million, nine hundred twelve thousand, eight hundred eighty-one".