816373689156 has 27 divisors (see below), whose sum is σ = 2063624973501. Its totient is φ = 272122755984.

The previous prime is 816373689139. The next prime is 816373689161. The reversal of 816373689156 is 651986373618.

The square root of 816373689156 is 903534.

It is a perfect power (a square), and thus also a powerful number.

816373689156 is a `hidden beast` number, since 81 + 63 + 7 + 368 + 91 + 56 = 666.

It can be written as a sum of positive squares in only one way, i.e., 546514218756 + 269859470400 = 739266^2 + 519480^2 .

It is a junction number, because it is equal to n+sod(n) for n = 816373689093 and 816373689102.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 5345910 + ... + 5496498.

Almost surely, 2^816373689156 is an apocalyptic number.

816373689156 is the 903534-th square number.

It is an amenable number.

816373689156 is an abundant number, since it is smaller than the sum of its proper divisors (1247251284345).

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

816373689156 is an frugal number, since it uses more digits than its factorization.

816373689156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301188 (or 150594 counting only the distinct ones).

The product of its digits is 39191040, while the sum is 63.

It can be divided in two parts, 816373 and 689156, that added together give a square (1505529 = 1227²).

The spelling of 816373689156 in words is "eight hundred sixteen billion, three hundred seventy-three million, six hundred eighty-nine thousand, one hundred fifty-six".