113989431465 has 128 divisors (see below), whose sum is σ = 256154680320. Its totient is φ = 46800820224.

The previous prime is 113989431463. The next prime is 113989431499. The reversal of 113989431465 is 564134989311.

113989431465 is a `hidden beast` number, since 1 + 1 + 3 + 98 + 94 + 3 + 1 + 465 = 666.

It is not a de Polignac number, because 113989431465 - 2¹ = 113989431463 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (113989431463) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 329157 + ... + 579933.

It is an arithmetic number, because the mean of its divisors is an integer number (2001208440).

Almost surely, 2^113989431465 is an apocalyptic number.

113989431465 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

113989431465 is an abundant number, since it is smaller than the sum of its proper divisors (142165248855).

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

113989431465 is a wasteful number, since it uses less digits than its factorization.

113989431465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250848 (or 250842 counting only the distinct ones).

The product of its digits is 2799360, while the sum is 54.

The spelling of 113989431465 in words is "one hundred thirteen billion, nine hundred eighty-nine million, four hundred thirty-one thousand, four hundred sixty-five".