64897630955 has 8 divisors (see below), whose sum is σ = 77898381792. Its totient is φ = 51903955008.

The previous prime is 64897630949. The next prime is 64897630969. The reversal of 64897630955 is 55903679846.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64897630955 - 2²⁰ = 64896582379 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1748519 + ... + 1785248.

It is an arithmetic number, because the mean of its divisors is an integer number (9737297724).

Almost surely, 2^64897630955 is an apocalyptic number.

64897630955 is a deficient number, since it is larger than the sum of its proper divisors (13000750837).

64897630955 is a wasteful number, since it uses less digits than its factorization.

64897630955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3537445.

The product of its (nonzero) digits is 48988800, while the sum is 62.

The spelling of 64897630955 in words is "sixty-four billion, eight hundred ninety-seven million, six hundred thirty thousand, nine hundred fifty-five".