15601986816 has 288 divisors, whose sum is σ = 45932113920. Its totient is φ = 4672512000.

The previous prime is 15601986791. The next prime is 15601986823. The reversal of 15601986816 is 61868910651.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a congruent number.

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, 103324341 + ... + 103324491.

Almost surely, 2^15601986816 is an apocalyptic number.

15601986816 is a gapful number since it is divisible by the number (16) 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 15601986816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22966056960).

15601986816 is an abundant number, since it is smaller than the sum of its proper divisors (30330127104).

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

15601986816 is a wasteful number, since it uses less digits than its factorization.

15601986816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393 (or 379 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 51.

The spelling of 15601986816 in words is "fifteen billion, six hundred one million, nine hundred eighty-six thousand, eight hundred sixteen".