36646642531 has 2 divisors, whose sum is σ = 36646642532. Its totient is φ = 36646642530.

The previous prime is 36646642519. The next prime is 36646642567. The reversal of 36646642531 is 13524664663.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 36646642531 - 2⁵ = 36646642499 is a prime.

It is a super-2 number, since 2×36646642531² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (36646642031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18323321265 + 18323321266.

It is an arithmetic number, because the mean of its divisors is an integer number (18323321266).

Almost surely, 2^36646642531 is an apocalyptic number.

36646642531 is a deficient number, since it is larger than the sum of its proper divisors (1).

36646642531 is an equidigital number, since it uses as much as digits as its factorization.

36646642531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1866240, while the sum is 46.

The spelling of 36646642531 in words is "thirty-six billion, six hundred forty-six million, six hundred forty-two thousand, five hundred thirty-one".