64359256261 has 2 divisors, whose sum is σ = 64359256262. Its totient is φ = 64359256260.

The previous prime is 64359256229. The next prime is 64359256277. The reversal of 64359256261 is 16265295346.

64359256261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35077544100 + 29281712161 = 187290^2 + 171119^2 .

It is a cyclic number.

It is not a de Polignac number, because 64359256261 - 2⁵ = 64359256229 is a prime.

It is a super-2 number, since 2×64359256261² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64359256861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32179628130 + 32179628131.

It is an arithmetic number, because the mean of its divisors is an integer number (32179628131).

Almost surely, 2^64359256261 is an apocalyptic number.

It is an amenable number.

64359256261 is a deficient number, since it is larger than the sum of its proper divisors (1).

64359256261 is an equidigital number, since it uses as much as digits as its factorization.

64359256261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2332800, while the sum is 49.

The spelling of 64359256261 in words is "sixty-four billion, three hundred fifty-nine million, two hundred fifty-six thousand, two hundred sixty-one".