111961861152 has 96 divisors (see below), whose sum is σ = 294742385280. Its totient is φ = 37213839360.

The previous prime is 111961861049. The next prime is 111961861153. The reversal of 111961861152 is 251168169111.

It is a tau number, because it is divible by the number of its divisors (96).

It is not an unprimeable number, because it can be changed into a prime (111961861153) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94802002 + ... + 94803182.

It is an arithmetic number, because the mean of its divisors is an integer number (3070233180).

Almost surely, 2^111961861152 is an apocalyptic number.

111961861152 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

111961861152 is an abundant number, since it is smaller than the sum of its proper divisors (182780524128).

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

111961861152 is a wasteful number, since it uses less digits than its factorization.

111961861152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3186 (or 3178 counting only the distinct ones).

The product of its digits is 25920, while the sum is 42.

The spelling of 111961861152 in words is "one hundred eleven billion, nine hundred sixty-one million, eight hundred sixty-one thousand, one hundred fifty-two".