64653474637 has 2 divisors, whose sum is σ = 64653474638. Its totient is φ = 64653474636.

The previous prime is 64653474617. The next prime is 64653474653. The reversal of 64653474637 is 73647435646.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36975828681 + 27677645956 = 192291^2 + 166366^2 .

It is a cyclic number.

It is not a de Polignac number, because 64653474637 - 2¹¹ = 64653472589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64653474617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32326737318 + 32326737319.

It is an arithmetic number, because the mean of its divisors is an integer number (32326737319).

Almost surely, 2^64653474637 is an apocalyptic number.

It is an amenable number.

64653474637 is a deficient number, since it is larger than the sum of its proper divisors (1).

64653474637 is an equidigital number, since it uses as much as digits as its factorization.

64653474637 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30481920, while the sum is 55.

The spelling of 64653474637 in words is "sixty-four billion, six hundred fifty-three million, four hundred seventy-four thousand, six hundred thirty-seven".