15558442860800 has 216 divisors, whose sum is σ = 44256839256000. Its totient is φ = 5304519843840.

The previous prime is 15558442860799. The next prime is 15558442860803. The reversal of 15558442860800 is 806824485551.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is not an unprimeable number, because it can be changed into a prime (15558442860803) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7049126 + ... + 8989274.

Almost surely, 2^{15558442860800} is an apocalyptic number.

15558442860800 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 15558442860800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22128419628000).

15558442860800 is an abundant number, since it is smaller than the sum of its proper divisors (28698396395200).

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

15558442860800 is a wasteful number, since it uses less digits than its factorization.

15558442860800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1940361 (or 1940342 counting only the distinct ones).

The product of its (nonzero) digits is 12288000, while the sum is 56.

The spelling of 15558442860800 in words is "fifteen trillion, five hundred fifty-eight billion, four hundred forty-two million, eight hundred sixty thousand, eight hundred".