1556488402560 has 2304 divisors, whose sum is σ = 7199638992000. Its totient is φ = 306226593792.

The previous prime is 1556488402543. The next prime is 1556488402631. The reversal of 1556488402560 is 652048846551.

1556488402560 is a `hidden beast` number, since 1 + 55 + 64 + 88 + 402 + 56 + 0 = 666.

It is a super-2 number, since 2×1556488402560² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1556488402497 and 1556488402506.

It is an unprimeable number.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 5786202106 + ... + 5786202374.

Almost surely, 2^{1556488402560} is an apocalyptic number.

1556488402560 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 1556488402560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3599819496000).

1556488402560 is an abundant number, since it is smaller than the sum of its proper divisors (5643150589440).

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

1556488402560 is a wasteful number, since it uses less digits than its factorization.

1556488402560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423 (or 401 counting only the distinct ones).

The product of its (nonzero) digits is 9216000, while the sum is 54.

The spelling of 1556488402560 in words is "one trillion, five hundred fifty-six billion, four hundred eighty-eight million, four hundred two thousand, five hundred sixty".