64118264521 has 2 divisors, whose sum is σ = 64118264522. Its totient is φ = 64118264520.

The previous prime is 64118264411. The next prime is 64118264563. The reversal of 64118264521 is 12546281146.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44463626496 + 19654638025 = 210864^2 + 140195^2 .

It is a cyclic number.

It is not a de Polignac number, because 64118264521 - 2¹⁵ = 64118231753 is a prime.

It is a super-2 number, since 2×64118264521² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (64118264621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32059132260 + 32059132261.

It is an arithmetic number, because the mean of its divisors is an integer number (32059132261).

Almost surely, 2^64118264521 is an apocalyptic number.

It is an amenable number.

64118264521 is a deficient number, since it is larger than the sum of its proper divisors (1).

64118264521 is an equidigital number, since it uses as much as digits as its factorization.

64118264521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 92160, while the sum is 40.

The spelling of 64118264521 in words is "sixty-four billion, one hundred eighteen million, two hundred sixty-four thousand, five hundred twenty-one".