11992620856 has 32 divisors (see below), whose sum is σ = 23211239040. Its totient is φ = 5804604288.

The previous prime is 11992620853. The next prime is 11992620859. The reversal of 11992620856 is 65802629911.

It is an interprime number because it is at equal distance from previous prime (11992620853) and next prime (11992620859).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11992620853) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44520 + ... + 161143.

It is an arithmetic number, because the mean of its divisors is an integer number (725351220).

Almost surely, 2^11992620856 is an apocalyptic number.

It is an amenable number.

11992620856 is a deficient number, since it is larger than the sum of its proper divisors (11218618184).

11992620856 is a wasteful number, since it uses less digits than its factorization.

11992620856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205903 (or 205899 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 49.

The spelling of 11992620856 in words is "eleven billion, nine hundred ninety-two million, six hundred twenty thousand, eight hundred fifty-six".