137640608173 has 2 divisors, whose sum is σ = 137640608174. Its totient is φ = 137640608172.

The previous prime is 137640608113. The next prime is 137640608177. The reversal of 137640608173 is 371806046731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 137613547369 + 27060804 = 370963^2 + 5202^2 .

It is a cyclic number.

It is not a de Polignac number, because 137640608173 - 2²⁹ = 137103737261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (137640608177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68820304086 + 68820304087.

It is an arithmetic number, because the mean of its divisors is an integer number (68820304087).

Almost surely, 2^137640608173 is an apocalyptic number.

It is an amenable number.

137640608173 is a deficient number, since it is larger than the sum of its proper divisors (1).

137640608173 is an equidigital number, since it uses as much as digits as its factorization.

137640608173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 508032, while the sum is 46.

The spelling of 137640608173 in words is "one hundred thirty-seven billion, six hundred forty million, six hundred eight thousand, one hundred seventy-three".