15565456140 has 192 divisors, whose sum is σ = 47629693440. Its totient is φ = 3775242240.

The previous prime is 15565456133. The next prime is 15565456187. The reversal of 15565456140 is 4165456551.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 15565456092 and 15565456101.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 31701295 + ... + 31701785.

It is an arithmetic number, because the mean of its divisors is an integer number (248071320).

Almost surely, 2^15565456140 is an apocalyptic number.

15565456140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15565456140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23814846720).

15565456140 is an abundant number, since it is smaller than the sum of its proper divisors (32064237300).

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

15565456140 is a wasteful number, since it uses less digits than its factorization.

15565456140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1032 (or 1030 counting only the distinct ones).

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

The spelling of 15565456140 in words is "fifteen billion, five hundred sixty-five million, four hundred fifty-six thousand, one hundred forty".