8315173644 has 12 divisors (see below), whose sum is σ = 19402071864. Its totient is φ = 2771724544.

The previous prime is 8315173631. The next prime is 8315173663. The reversal of 8315173644 is 4463715138.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×8315173644² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 8315173596 and 8315173605.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 346465557 + ... + 346465580.

It is an arithmetic number, because the mean of its divisors is an integer number (1616839322).

Almost surely, 2^8315173644 is an apocalyptic number.

It is an amenable number.

8315173644 is an abundant number, since it is smaller than the sum of its proper divisors (11086898220).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8315173644 is a wasteful number, since it uses less digits than its factorization.

8315173644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 692931144 (or 692931142 counting only the distinct ones).

The product of its digits is 241920, while the sum is 42.

The square root of 8315173644 is about 91187.5739561043. The cubic root of 8315173644 is about 2025.9269155093.

The spelling of 8315173644 in words is "eight billion, three hundred fifteen million, one hundred seventy-three thousand, six hundred forty-four".