816654672 has 30 divisors (see below), whose sum is σ = 2285499242. Its totient is φ = 272218176.

The previous prime is 816654647. The next prime is 816654697. The reversal of 816654672 is 276456618.

It is an interprime number because it is at equal distance from previous prime (816654647) and next prime (816654697).

It can be written as a sum of positive squares in only one way, i.e., 708411456 + 108243216 = 26616^2 + 10404^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2835463 + ... + 2835750.

Almost surely, 2^816654672 is an apocalyptic number.

It is an amenable number.

816654672 is an abundant number, since it is smaller than the sum of its proper divisors (1468844570).

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

816654672 is a wasteful number, since it uses less digits than its factorization.

816654672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5671227 (or 5671218 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The square root of 816654672 is about 28577.1704687501. The cubic root of 816654672 is about 934.7155843252.

It can be divided in two parts, 8166546 and 72, that added together give a palindrome (8166618).

The spelling of 816654672 in words is "eight hundred sixteen million, six hundred fifty-four thousand, six hundred seventy-two".