15863480640 has 1120 divisors, whose sum is σ = 70634108160. Its totient is φ = 3296526336.

The previous prime is 15863480639. The next prime is 15863480707. The reversal of 15863480640 is 4608436851.

15863480640 is a `hidden beast` number, since 1 + 5 + 8 + 634 + 8 + 0 + 6 + 4 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (1120).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 114125691 + ... + 114125829.

It is an arithmetic number, because the mean of its divisors is an integer number (63066168).

Almost surely, 2^15863480640 is an apocalyptic number.

15863480640 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 15863480640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35317054080).

15863480640 is an abundant number, since it is smaller than the sum of its proper divisors (54770627520).

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

15863480640 is a wasteful number, since it uses less digits than its factorization.

15863480640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229 (or 210 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 45.

The spelling of 15863480640 in words is "fifteen billion, eight hundred sixty-three million, four hundred eighty thousand, six hundred forty".