64221535051 has 4 divisors (see below), whose sum is σ = 66293197504. Its totient is φ = 62149872600.

The previous prime is 64221535043. The next prime is 64221535087. The reversal of 64221535051 is 15053512246.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 64221535051 - 2³ = 64221535043 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64221534998 and 64221535016.

It is not an unprimeable number, because it can be changed into a prime (64221535151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1035831180 + ... + 1035831241.

It is an arithmetic number, because the mean of its divisors is an integer number (16573299376).

Almost surely, 2^64221535051 is an apocalyptic number.

64221535051 is a deficient number, since it is larger than the sum of its proper divisors (2071662453).

64221535051 is a wasteful number, since it uses less digits than its factorization.

64221535051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2071662452.

The product of its (nonzero) digits is 36000, while the sum is 34.

The spelling of 64221535051 in words is "sixty-four billion, two hundred twenty-one million, five hundred thirty-five thousand, fifty-one".