81673014426375 has 64 divisors (see below), whose sum is σ = 136725353856000. Its totient is φ = 43295682556800.

The previous prime is 81673014426307. The next prime is 81673014426389. The reversal of 81673014426375 is 57362441037618.

It is not a de Polignac number, because 81673014426375 - 2²² = 81673010232071 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, 1938160056 + ... + 1938202194.

It is an arithmetic number, because the mean of its divisors is an integer number (2136333654000).

Almost surely, 2^{81673014426375} is an apocalyptic number.

81673014426375 is a deficient number, since it is larger than the sum of its proper divisors (55052339429625).

81673014426375 is a wasteful number, since it uses less digits than its factorization.

81673014426375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73273 (or 73263 counting only the distinct ones).

The product of its (nonzero) digits is 20321280, while the sum is 57.

The spelling of 81673014426375 in words is "eighty-one trillion, six hundred seventy-three billion, fourteen million, four hundred twenty-six thousand, three hundred seventy-five".