15671255556 has 96 divisors (see below), whose sum is σ = 42100531200. Its totient is φ = 4487080320.

The previous prime is 15671255533. The next prime is 15671255591. The reversal of 15671255556 is 65555217651.

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, 967581 + ... + 983643.

It is an arithmetic number, because the mean of its divisors is an integer number (438547200).

Almost surely, 2^15671255556 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 15671255556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21050265600).

15671255556 is an abundant number, since it is smaller than the sum of its proper divisors (26429275644).

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

15671255556 is a wasteful number, since it uses less digits than its factorization.

15671255556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16489 (or 16487 counting only the distinct ones).

The product of its digits is 1575000, while the sum is 48.

The spelling of 15671255556 in words is "fifteen billion, six hundred seventy-one million, two hundred fifty-five thousand, five hundred fifty-six".