816326291732 has 24 divisors (see below), whose sum is σ = 1648817466240. Its totient is φ = 346390221600.

The previous prime is 816326291707. The next prime is 816326291743. The reversal of 816326291732 is 237192623618.

It is a super-2 number, since 2×816326291732² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 144326432 + ... + 144332087.

It is an arithmetic number, because the mean of its divisors is an integer number (68700727760).

Almost surely, 2^816326291732 is an apocalyptic number.

It is an amenable number.

816326291732 is an abundant number, since it is smaller than the sum of its proper divisors (832491174508).

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

816326291732 is a wasteful number, since it uses less digits than its factorization.

816326291732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288658631 (or 288658629 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 50.

The spelling of 816326291732 in words is "eight hundred sixteen billion, three hundred twenty-six million, two hundred ninety-one thousand, seven hundred thirty-two".