46640664137 has 2 divisors, whose sum is σ = 46640664138. Its totient is φ = 46640664136.

The previous prime is 46640664131. The next prime is 46640664193. The reversal of 46640664137 is 73146604664.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30047102281 + 16593561856 = 173341^2 + 128816^2 .

It is a cyclic number.

It is not a de Polignac number, because 46640664137 - 2²⁴ = 46623886921 is a prime.

It is a super-2 number, since 2×46640664137² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 46640664091 and 46640664100.

It is not a weakly prime, because it can be changed into another prime (46640664131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23320332068 + 23320332069.

It is an arithmetic number, because the mean of its divisors is an integer number (23320332069).

Almost surely, 2^46640664137 is an apocalyptic number.

It is an amenable number.

46640664137 is a deficient number, since it is larger than the sum of its proper divisors (1).

46640664137 is an equidigital number, since it uses as much as digits as its factorization.

46640664137 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1741824, while the sum is 47.

The spelling of 46640664137 in words is "forty-six billion, six hundred forty million, six hundred sixty-four thousand, one hundred thirty-seven".