113387523840 has 144 divisors (see below), whose sum is σ = 402368349600. Its totient is φ = 30236663808.

The previous prime is 113387523833. The next prime is 113387523841. The reversal of 113387523840 is 48325783311.

113387523840 is a `hidden beast` number, since 1 + 1 + 3 + 3 + 87 + 523 + 8 + 40 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113387523841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1605885 + ... + 1675004.

It is an arithmetic number, because the mean of its divisors is an integer number (2794224650).

Almost surely, 2^113387523840 is an apocalyptic number.

113387523840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

113387523840 is an abundant number, since it is smaller than the sum of its proper divisors (288980825760).

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

113387523840 is an equidigital number, since it uses as much as digits as its factorization.

113387523840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3280919 (or 3280899 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

The spelling of 113387523840 in words is "one hundred thirteen billion, three hundred eighty-seven million, five hundred twenty-three thousand, eight hundred forty".