15815106648 has 96 divisors (see below), whose sum is σ = 47140226640. Its totient is φ = 4750018560.

The previous prime is 15815106631. The next prime is 15815106653. The reversal of 15815106648 is 84660151851.

15815106648 is a `hidden beast` number, since 1 + 581 + 5 + 1 + 0 + 6 + 64 + 8 = 666.

15815106648 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×15815106648² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1140 + ... + 177852.

Almost surely, 2^15815106648 is an apocalyptic number.

15815106648 is a gapful number since it is divisible by the number (18) 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 15815106648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23570113320).

15815106648 is an abundant number, since it is smaller than the sum of its proper divisors (31325119992).

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

15815106648 is a wasteful number, since it uses less digits than its factorization.

15815106648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176849 (or 176842 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 45.

The spelling of 15815106648 in words is "fifteen billion, eight hundred fifteen million, one hundred six thousand, six hundred forty-eight".