11817617312 has 24 divisors (see below), whose sum is σ = 23496296292. Its totient is φ = 5850304000.

The previous prime is 11817617309. The next prime is 11817617351. The reversal of 11817617312 is 21371671811.

It can be written as a sum of positive squares in 2 ways, for example, as 11381475856 + 436141456 = 106684^2 + 20884^2 .

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, 1824989 + ... + 1831452.

Almost surely, 2^11817617312 is an apocalyptic number.

It is an amenable number.

11817617312 is a deficient number, since it is larger than the sum of its proper divisors (11678678980).

11817617312 is a wasteful number, since it uses less digits than its factorization.

11817617312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3656552 (or 3656544 counting only the distinct ones).

The product of its digits is 14112, while the sum is 38.

The spelling of 11817617312 in words is "eleven billion, eight hundred seventeen million, six hundred seventeen thousand, three hundred twelve".