115865073545 has 16 divisors (see below), whose sum is σ = 149966973072. Its totient is φ = 85428387840.

The previous prime is 115865073521. The next prime is 115865073547. The reversal of 115865073545 is 545370568511.

It can be written as a sum of positive squares in 8 ways, for example, as 1190733049 + 114674340496 = 34507^2 + 338636^2 .

It is not a de Polignac number, because 115865073545 - 2²⁴ = 115848296329 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 115865073493 and 115865073502.

It is not an unprimeable number, because it can be changed into a prime (115865073547) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1348772 + ... + 1432101.

It is an arithmetic number, because the mean of its divisors is an integer number (9372935817).

Almost surely, 2^115865073545 is an apocalyptic number.

It is an amenable number.

115865073545 is a deficient number, since it is larger than the sum of its proper divisors (34101899527).

115865073545 is a wasteful number, since it uses less digits than its factorization.

115865073545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2781532.

The product of its (nonzero) digits is 2520000, while the sum is 50.

The spelling of 115865073545 in words is "one hundred fifteen billion, eight hundred sixty-five million, seventy-three thousand, five hundred forty-five".