64632693193 has 12 divisors (see below), whose sum is σ = 68674535692. Its totient is φ = 60816349440.

The previous prime is 64632693187. The next prime is 64632693241. The reversal of 64632693193 is 39139623646.

It can be written as a sum of positive squares in 6 ways, for example, as 9333878544 + 55298814649 = 96612^2 + 235157^2 .

It is not a de Polignac number, because 64632693193 - 2⁵ = 64632693161 is a prime.

It is a hoax number, since the sum of its digits (52) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64632693193.

It is not an unprimeable number, because it can be changed into a prime (64632693143) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1311271 + ... + 1359667.

Almost surely, 2^64632693193 is an apocalyptic number.

It is an amenable number.

64632693193 is a deficient number, since it is larger than the sum of its proper divisors (4041842499).

64632693193 is a wasteful number, since it uses less digits than its factorization.

64632693193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53052 (or 53035 counting only the distinct ones).

The product of its digits is 3779136, while the sum is 52.

The spelling of 64632693193 in words is "sixty-four billion, six hundred thirty-two million, six hundred ninety-three thousand, one hundred ninety-three".