15620428800 has 660 divisors, whose sum is σ = 59952142976. Its totient is φ = 4031078400.

The previous prime is 15620428799. The next prime is 15620428819. The reversal of 15620428800 is 882402651.

15620428800 is a `hidden beast` number, since 1 + 5 + 620 + 4 + 28 + 8 + 0 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 503884785 + ... + 503884815.

Almost surely, 2^15620428800 is an apocalyptic number.

15620428800 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 15620428800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29976071488).

15620428800 is an abundant number, since it is smaller than the sum of its proper divisors (44331714176).

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

15620428800 is an frugal number, since it uses more digits than its factorization.

15620428800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88 (or 41 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 36.

The spelling of 15620428800 in words is "fifteen billion, six hundred twenty million, four hundred twenty-eight thousand, eight hundred".