64621013995 has 32 divisors (see below), whose sum is σ = 79449906240. Its totient is φ = 50438868480.

The previous prime is 64621013993. The next prime is 64621013999. The reversal of 64621013995 is 59931012646.

It is not a de Polignac number, because 64621013995 - 2¹ = 64621013993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64621013993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44290576 + ... + 44292034.

It is an arithmetic number, because the mean of its divisors is an integer number (2482809570).

Almost surely, 2^64621013995 is an apocalyptic number.

64621013995 is a deficient number, since it is larger than the sum of its proper divisors (14828892245).

64621013995 is a wasteful number, since it uses less digits than its factorization.

64621013995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2335.

The product of its (nonzero) digits is 349920, while the sum is 46.

The spelling of 64621013995 in words is "sixty-four billion, six hundred twenty-one million, thirteen thousand, nine hundred ninety-five".