73000091565 has 64 divisors (see below), whose sum is σ = 130806190080. Its totient is φ = 38625595200.

The previous prime is 73000091557. The next prime is 73000091579. The reversal of 73000091565 is 56519000037.

It is a happy number.

73000091565 is a `hidden beast` number, since 7 + 3 + 0 + 0 + 0 + 0 + 91 + 565 = 666.

It is not a de Polignac number, because 73000091565 - 2³ = 73000091557 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 20036634 + ... + 20040276.

It is an arithmetic number, because the mean of its divisors is an integer number (2043846720).

Almost surely, 2^73000091565 is an apocalyptic number.

It is an amenable number.

73000091565 is a deficient number, since it is larger than the sum of its proper divisors (57806098515).

73000091565 is a wasteful number, since it uses less digits than its factorization.

73000091565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4791 (or 4785 counting only the distinct ones).

The product of its (nonzero) digits is 28350, while the sum is 36.

The spelling of 73000091565 in words is "seventy-three billion, ninety-one thousand, five hundred sixty-five".