113581821648 has 80 divisors (see below), whose sum is σ = 294128174592. Its totient is φ = 37769328000.

The previous prime is 113581821637. The next prime is 113581821701. The reversal of 113581821648 is 846128185311.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 113581821597 and 113581821606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58819243 + ... + 58821173.

Almost surely, 2^113581821648 is an apocalyptic number.

It is an amenable number.

113581821648 is an abundant number, since it is smaller than the sum of its proper divisors (180546352944).

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

113581821648 is a wasteful number, since it uses less digits than its factorization.

113581821648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4264 (or 4258 counting only the distinct ones).

The product of its digits is 368640, while the sum is 48.

The spelling of 113581821648 in words is "one hundred thirteen billion, five hundred eighty-one million, eight hundred twenty-one thousand, six hundred forty-eight".