64632510893 has 2 divisors, whose sum is σ = 64632510894. Its totient is φ = 64632510892.

The previous prime is 64632510889. The next prime is 64632510949. The reversal of 64632510893 is 39801523646.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34552117924 + 30080392969 = 185882^2 + 173437^2 .

It is a cyclic number.

It is not a de Polignac number, because 64632510893 - 2² = 64632510889 is a prime.

It is a super-2 number, since 2×64632510893² (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 (64632510193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32316255446 + 32316255447.

It is an arithmetic number, because the mean of its divisors is an integer number (32316255447).

Almost surely, 2^64632510893 is an apocalyptic number.

It is an amenable number.

64632510893 is a deficient number, since it is larger than the sum of its proper divisors (1).

64632510893 is an equidigital number, since it uses as much as digits as its factorization.

64632510893 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 933120, while the sum is 47.

The spelling of 64632510893 in words is "sixty-four billion, six hundred thirty-two million, five hundred ten thousand, eight hundred ninety-three".