81760617995 has 32 divisors (see below), whose sum is σ = 116031052800. Its totient is φ = 54114512256.

The previous prime is 81760617979. The next prime is 81760618007. The reversal of 81760617995 is 59971606718.

It is not a de Polignac number, because 81760617995 - 2⁴ = 81760617979 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3894236 + ... + 3915174.

It is an arithmetic number, because the mean of its divisors is an integer number (3625970400).

Almost surely, 2^81760617995 is an apocalyptic number.

81760617995 is a deficient number, since it is larger than the sum of its proper divisors (34270434805).

81760617995 is a wasteful number, since it uses less digits than its factorization.

81760617995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24827.

The product of its (nonzero) digits is 5715360, while the sum is 59.

The spelling of 81760617995 in words is "eighty-one billion, seven hundred sixty million, six hundred seventeen thousand, nine hundred ninety-five".