15520131445056 has 224 divisors, whose sum is σ = 50025239040000. Its totient is φ = 4147760867328.

The previous prime is 15520131445003. The next prime is 15520131445069. The reversal of 15520131445056 is 65054413102551.

It is a tau number, because it is divible by the number of its divisors (224).

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

It is a junction number, because it is equal to n+sod(n) for n = 15520131444999 and 15520131445017.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1829331 + ... + 5864018.

It is an arithmetic number, because the mean of its divisors is an integer number (223326960000).

Almost surely, 2^{15520131445056} is an apocalyptic number.

15520131445056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

15520131445056 is an abundant number, since it is smaller than the sum of its proper divisors (34505107594944).

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

15520131445056 is a wasteful number, since it uses less digits than its factorization.

15520131445056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7693469 (or 7693459 counting only the distinct ones).

The product of its (nonzero) digits is 360000, while the sum is 42.

The spelling of 15520131445056 in words is "fifteen trillion, five hundred twenty billion, one hundred thirty-one million, four hundred forty-five thousand, fifty-six".