15916293648 has 60 divisors (see below), whose sum is σ = 46079511660. Its totient is φ = 5122483968.

The previous prime is 15916293643. The next prime is 15916293649. The reversal of 15916293648 is 84639261951.

15916293648 is a `hidden beast` number, since 1 + 5 + 9 + 1 + 629 + 3 + 6 + 4 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 10896854544 + 5019439104 = 104388^2 + 70848^2 .

It is a junction number, because it is equal to n+sod(n) for n = 15916293594 and 15916293603.

It is not an unprimeable number, because it can be changed into a prime (15916293643) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1901511 + ... + 1909862.

It is an arithmetic number, because the mean of its divisors is an integer number (767991861).

Almost surely, 2^15916293648 is an apocalyptic number.

15916293648 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

15916293648 is an abundant number, since it is smaller than the sum of its proper divisors (30163218012).

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

15916293648 is a wasteful number, since it uses less digits than its factorization.

15916293648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3811416 (or 3811407 counting only the distinct ones).

The product of its digits is 2799360, while the sum is 54.

The spelling of 15916293648 in words is "fifteen billion, nine hundred sixteen million, two hundred ninety-three thousand, six hundred forty-eight".