15628746881 has 8 divisors (see below), whose sum is σ = 17265360000. Its totient is φ = 14028103440.

The previous prime is 15628746877. The next prime is 15628746899. The reversal of 15628746881 is 18864782651.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 15628746881 - 2² = 15628746877 is a prime.

It is a super-2 number, since 2×15628746881² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (15628746811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8991506 + ... + 8993243.

It is an arithmetic number, because the mean of its divisors is an integer number (2158170000).

Almost surely, 2^15628746881 is an apocalyptic number.

15628746881 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

15628746881 is a deficient number, since it is larger than the sum of its proper divisors (1636613119).

15628746881 is a wasteful number, since it uses less digits than its factorization.

15628746881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17984839.

The product of its digits is 5160960, while the sum is 56.

The spelling of 15628746881 in words is "fifteen billion, six hundred twenty-eight million, seven hundred forty-six thousand, eight hundred eighty-one".