816371173137 has 16 divisors (see below), whose sum is σ = 1175148551808. Its totient is φ = 501129427200.

The previous prime is 816371173133. The next prime is 816371173139. The reversal of 816371173137 is 731371173618.

It is not a de Polignac number, because 816371173137 - 2² = 816371173133 is a prime.

It is not an unprimeable number, because it can be changed into a prime (816371173133) 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, 26084853 + ... + 26116130.

It is an arithmetic number, because the mean of its divisors is an integer number (73446784488).

Almost surely, 2^816371173137 is an apocalyptic number.

It is an amenable number.

816371173137 is a deficient number, since it is larger than the sum of its proper divisors (358777378671).

816371173137 is a wasteful number, since it uses less digits than its factorization.

816371173137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52201400.

The product of its digits is 444528, while the sum is 48.

The spelling of 816371173137 in words is "eight hundred sixteen billion, three hundred seventy-one million, one hundred seventy-three thousand, one hundred thirty-seven".