23557281216 has 112 divisors (see below), whose sum is σ = 71268092160. Its totient is φ = 6727311360.

The previous prime is 23557281197. The next prime is 23557281229. The reversal of 23557281216 is 61218275532.

It is a tau number, because it is divible by the number of its divisors (112).

It is a Harshad number since it is a multiple of its sum of digits (42).

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, 4256371 + ... + 4261901.

Almost surely, 2^23557281216 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23557281216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35634046080).

23557281216 is an abundant number, since it is smaller than the sum of its proper divisors (47710810944).

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

23557281216 is a wasteful number, since it uses less digits than its factorization.

23557281216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8722 (or 8712 counting only the distinct ones).

The product of its digits is 201600, while the sum is 42.

The spelling of 23557281216 in words is "twenty-three billion, five hundred fifty-seven million, two hundred eighty-one thousand, two hundred sixteen".