15316720640 has 176 divisors, whose sum is σ = 39740621760. Its totient is φ = 5630853120.

The previous prime is 15316720619. The next prime is 15316720681. The reversal of 15316720640 is 4602761351.

It is a self number, because there is not a number n which added to its sum of digits gives 15316720640.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23894720 + ... + 23895360.

Almost surely, 2^15316720640 is an apocalyptic number.

15316720640 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 15316720640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19870310880).

15316720640 is an abundant number, since it is smaller than the sum of its proper divisors (24423901120).

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

15316720640 is a wasteful number, since it uses less digits than its factorization.

15316720640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1038 (or 1020 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 35.

The spelling of 15316720640 in words is "fifteen billion, three hundred sixteen million, seven hundred twenty thousand, six hundred forty".