111897487772788 has 24 divisors (see below), whose sum is σ = 196268263107840. Its totient is φ = 55820843248800.

The previous prime is 111897487772773. The next prime is 111897487772797. The reversal of 111897487772788 is 887277784798111.

It is a super-2 number, since 2×111897487772788² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 349549170 + ... + 349869142.

It is an arithmetic number, because the mean of its divisors is an integer number (8177844296160).

Almost surely, 2^{111897487772788} is an apocalyptic number.

It is an amenable number.

111897487772788 is a deficient number, since it is larger than the sum of its proper divisors (84370775335052).

111897487772788 is a wasteful number, since it uses less digits than its factorization.

111897487772788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 519567 (or 519565 counting only the distinct ones).

The product of its digits is 4956585984, while the sum is 85.

The spelling of 111897487772788 in words is "one hundred eleven trillion, eight hundred ninety-seven billion, four hundred eighty-seven million, seven hundred seventy-two thousand, seven hundred eighty-eight".