64434264050621 has 2 divisors, whose sum is σ = 64434264050622. Its totient is φ = 64434264050620.

The previous prime is 64434264050609. The next prime is 64434264050627. The reversal of 64434264050621 is 12605046243446.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43308060544996 + 21126203505625 = 6580886^2 + 4596325^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64434264050621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64434264050627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32217132025310 + 32217132025311.

It is an arithmetic number, because the mean of its divisors is an integer number (32217132025311).

Almost surely, 2^{64434264050621} is an apocalyptic number.

It is an amenable number.

64434264050621 is a deficient number, since it is larger than the sum of its proper divisors (1).

64434264050621 is an equidigital number, since it uses as much as digits as its factorization.

64434264050621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3317760, while the sum is 47.

The spelling of 64434264050621 in words is "sixty-four trillion, four hundred thirty-four billion, two hundred sixty-four million, fifty thousand, six hundred twenty-one".