15619802640 has 320 divisors, whose sum is σ = 55458950400. Its totient is φ = 3615154176.

The previous prime is 15619802633. The next prime is 15619802651. The reversal of 15619802640 is 4620891651.

It is a junction number, because it is equal to n+sod(n) for n = 15619802592 and 15619802601.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 15328051 + ... + 15329069.

It is an arithmetic number, because the mean of its divisors is an integer number (173309220).

Almost surely, 2^15619802640 is an apocalyptic number.

15619802640 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 15619802640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27729475200).

15619802640 is an abundant number, since it is smaller than the sum of its proper divisors (39839147760).

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

15619802640 is a wasteful number, since it uses less digits than its factorization.

15619802640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1099 (or 1059 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 42.

The spelling of 15619802640 in words is "fifteen billion, six hundred nineteen million, eight hundred two thousand, six hundred forty".