111591739440 has 120 divisors (see below), whose sum is σ = 380040774048. Its totient is φ = 29338659840.

The previous prime is 111591739429. The next prime is 111591739453. The reversal of 111591739440 is 44937195111.

111591739440 is a `hidden beast` number, since 1 + 11 + 591 + 7 + 3 + 9 + 4 + 40 = 666.

It is a tau number, because it is divible by the number of its divisors (120).

It is a super-2 number, since 2×111591739440² (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 an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1040349 + ... + 1142588.

Almost surely, 2^111591739440 is an apocalyptic number.

111591739440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111591739440 is an abundant number, since it is smaller than the sum of its proper divisors (268449034608).

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

111591739440 is a wasteful number, since it uses less digits than its factorization.

111591739440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2183027 (or 2183018 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 45.

The spelling of 111591739440 in words is "one hundred eleven billion, five hundred ninety-one million, seven hundred thirty-nine thousand, four hundred forty".