815712116 has 24 divisors (see below), whose sum is σ = 1481025000. Its totient is φ = 392644224.

The previous prime is 815712061. The next prime is 815712137. The reversal of 815712116 is 611217518.

It can be written as a sum of positive squares in 4 ways, for example, as 191711716 + 624000400 = 13846^2 + 24980^2 .

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, 30410 + ... + 50558.

It is an arithmetic number, because the mean of its divisors is an integer number (61709375).

Almost surely, 2^815712116 is an apocalyptic number.

It is an amenable number.

815712116 is a deficient number, since it is larger than the sum of its proper divisors (665312884).

815712116 is a wasteful number, since it uses less digits than its factorization.

815712116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20531 (or 20529 counting only the distinct ones).

The product of its digits is 3360, while the sum is 32.

The square root of 815712116 is about 28560.6742917600. The cubic root of 815712116 is about 934.3558398788.

The spelling of 815712116 in words is "eight hundred fifteen million, seven hundred twelve thousand, one hundred sixteen".