73718766137 has 2 divisors, whose sum is σ = 73718766138. Its totient is φ = 73718766136.

The previous prime is 73718766131. The next prime is 73718766157. The reversal of 73718766137 is 73166781737.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73712793001 + 5973136 = 271501^2 + 2444^2 .

It is a cyclic number.

It is not a de Polignac number, because 73718766137 - 2²⁶ = 73651657273 is a prime.

It is not a weakly prime, because it can be changed into another prime (73718766131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36859383068 + 36859383069.

It is an arithmetic number, because the mean of its divisors is an integer number (36859383069).

Almost surely, 2^73718766137 is an apocalyptic number.

It is an amenable number.

73718766137 is a deficient number, since it is larger than the sum of its proper divisors (1).

73718766137 is an equidigital number, since it uses as much as digits as its factorization.

73718766137 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6223392, while the sum is 56.

The spelling of 73718766137 in words is "seventy-three billion, seven hundred eighteen million, seven hundred sixty-six thousand, one hundred thirty-seven".