64644932629 has 2 divisors, whose sum is σ = 64644932630. Its totient is φ = 64644932628.

The previous prime is 64644932563. The next prime is 64644932641. The reversal of 64644932629 is 92623944646.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60566194404 + 4078738225 = 246102^2 + 63865^2 .

It is a cyclic number.

It is not a de Polignac number, because 64644932629 - 2⁷ = 64644932501 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64644932629.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64644932659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32322466314 + 32322466315.

It is an arithmetic number, because the mean of its divisors is an integer number (32322466315).

Almost surely, 2^64644932629 is an apocalyptic number.

It is an amenable number.

64644932629 is a deficient number, since it is larger than the sum of its proper divisors (1).

64644932629 is an equidigital number, since it uses as much as digits as its factorization.

64644932629 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13436928, while the sum is 55.

The spelling of 64644932629 in words is "sixty-four billion, six hundred forty-four million, nine hundred thirty-two thousand, six hundred twenty-nine".