111662645220 has 72 divisors (see below), whose sum is σ = 387097174464. Its totient is φ = 25522890048.

The previous prime is 111662645179. The next prime is 111662645287. The reversal of 111662645220 is 22546266111.

111662645220 is a `hidden beast` number, since 1 + 1 + 1 + 6 + 6 + 2 + 645 + 2 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44309314 + ... + 44311833.

Almost surely, 2^111662645220 is an apocalyptic number.

111662645220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111662645220 is an abundant number, since it is smaller than the sum of its proper divisors (275434529244).

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

111662645220 is a wasteful number, since it uses less digits than its factorization.

111662645220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88621169 (or 88621164 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The spelling of 111662645220 in words is "one hundred eleven billion, six hundred sixty-two million, six hundred forty-five thousand, two hundred twenty".