64871158631 has 2 divisors, whose sum is σ = 64871158632. Its totient is φ = 64871158630.

The previous prime is 64871158613. The next prime is 64871158717. The reversal of 64871158631 is 13685117846.

It is a happy number.

Together with previous prime (64871158613) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64871158631 - 2⁶ = 64871158567 is a prime.

It is a super-2 number, since 2×64871158631² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 64871158631.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64871158531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32435579315 + 32435579316.

It is an arithmetic number, because the mean of its divisors is an integer number (32435579316).

Almost surely, 2^64871158631 is an apocalyptic number.

64871158631 is a deficient number, since it is larger than the sum of its proper divisors (1).

64871158631 is an equidigital number, since it uses as much as digits as its factorization.

64871158631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 967680, while the sum is 50.

The spelling of 64871158631 in words is "sixty-four billion, eight hundred seventy-one million, one hundred fifty-eight thousand, six hundred thirty-one".