111377815560 has 896 divisors, whose sum is σ = 442410024960. Its totient is φ = 24942297600.

The previous prime is 111377815543. The next prime is 111377815561. The reversal of 111377815560 is 65518773111.

111377815560 is a `hidden beast` number, since 1 + 1 + 1 + 3 + 7 + 7 + 81 + 5 + 560 = 666.

It is a super-2 number, since 2×111377815560² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (111377815561) by changing a digit.

It is a polite number, since it can be written in 223 ways as a sum of consecutive naturals, for example, 228701637 + ... + 228702123.

Almost surely, 2^111377815560 is an apocalyptic number.

111377815560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111377815560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (221205012480).

111377815560 is an abundant number, since it is smaller than the sum of its proper divisors (331032209400).

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

111377815560 is a wasteful number, since it uses less digits than its factorization.

111377815560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 581 (or 562 counting only the distinct ones).

The product of its (nonzero) digits is 176400, while the sum is 45.

The spelling of 111377815560 in words is "one hundred eleven billion, three hundred seventy-seven million, eight hundred fifteen thousand, five hundred sixty".