113540401520 has 80 divisors (see below), whose sum is σ = 324900246720. Its totient is φ = 35933663232.

The previous prime is 113540401493. The next prime is 113540401573. The reversal of 113540401520 is 25104045311.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a self number, because there is not a number n which added to its sum of digits gives 113540401520.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7790825 + ... + 7805384.

It is an arithmetic number, because the mean of its divisors is an integer number (4061253084).

Almost surely, 2^113540401520 is an apocalyptic number.

113540401520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

113540401520 is an abundant number, since it is smaller than the sum of its proper divisors (211359845200).

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

113540401520 is a wasteful number, since it uses less digits than its factorization.

113540401520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15596242 (or 15596236 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

Adding to 113540401520 its reverse (25104045311), we get a palindrome (138644446831).

The spelling of 113540401520 in words is "one hundred thirteen billion, five hundred forty million, four hundred one thousand, five hundred twenty".