73661771115 has 64 divisors (see below), whose sum is σ = 135248486400. Its totient is φ = 37999324800.

The previous prime is 73661771111. The next prime is 73661771179. The reversal of 73661771115 is 51117716637.

73661771115 is a `hidden beast` number, since 7 + 3 + 6 + 617 + 7 + 11 + 15 = 666.

It is not a de Polignac number, because 73661771115 - 2² = 73661771111 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (73661771111) 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 in 63 ways as a sum of consecutive naturals, for example, 11668810 + ... + 11675120.

It is an arithmetic number, because the mean of its divisors is an integer number (2113257600).

Almost surely, 2^73661771115 is an apocalyptic number.

73661771115 is a deficient number, since it is larger than the sum of its proper divisors (61586715285).

73661771115 is a wasteful number, since it uses less digits than its factorization.

73661771115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9145 (or 9139 counting only the distinct ones).

The product of its digits is 185220, while the sum is 45.

The spelling of 73661771115 in words is "seventy-three billion, six hundred sixty-one million, seven hundred seventy-one thousand, one hundred fifteen".