11973897056 has 24 divisors (see below), whose sum is σ = 25716666024. Its totient is φ = 5442680320.

The previous prime is 11973897053. The next prime is 11973897077. The reversal of 11973897056 is 65079837911.

It is a junction number, because it is equal to n+sod(n) for n = 11973896992 and 11973897010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11973897053) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17008025 + ... + 17008728.

It is an arithmetic number, because the mean of its divisors is an integer number (1071527751).

Almost surely, 2^11973897056 is an apocalyptic number.

11973897056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

11973897056 is an abundant number, since it is smaller than the sum of its proper divisors (13742768968).

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

11973897056 is a wasteful number, since it uses less digits than its factorization.

11973897056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34016774 (or 34016766 counting only the distinct ones).

The product of its (nonzero) digits is 2857680, while the sum is 56.

The spelling of 11973897056 in words is "eleven billion, nine hundred seventy-three million, eight hundred ninety-seven thousand, fifty-six".