64118264021 has 4 divisors (see below), whose sum is σ = 73278016032. Its totient is φ = 54958512012.

The previous prime is 64118264003. The next prime is 64118264083. The reversal of 64118264021 is 12046281146.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 64118264021 - 2³⁴ = 46938394837 is a prime.

It is a super-2 number, since 2×64118264021² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64118264521) 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, 4579875995 + ... + 4579876008.

It is an arithmetic number, because the mean of its divisors is an integer number (18319504008).

Almost surely, 2^64118264021 is an apocalyptic number.

It is an amenable number.

64118264021 is a deficient number, since it is larger than the sum of its proper divisors (9159752011).

64118264021 is an equidigital number, since it uses as much as digits as its factorization.

64118264021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9159752010.

The product of its (nonzero) digits is 18432, while the sum is 35.

The spelling of 64118264021 in words is "sixty-four billion, one hundred eighteen million, two hundred sixty-four thousand, twenty-one".