15961798359 has 168 divisors, whose sum is σ = 27881048448. Its totient is φ = 9107017920.

The previous prime is 15961798343. The next prime is 15961798367. The reversal of 15961798359 is 95389716951.

15961798359 is a `hidden beast` number, since 1 + 5 + 9 + 617 + 9 + 8 + 3 + 5 + 9 = 666.

It is not a de Polignac number, because 15961798359 - 2⁴ = 15961798343 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 15961798296 and 15961798305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15961798339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 167 ways as a sum of consecutive naturals, for example, 121845724 + ... + 121845854.

Almost surely, 2^15961798359 is an apocalyptic number.

15961798359 is a deficient number, since it is larger than the sum of its proper divisors (11919250089).

15961798359 is a wasteful number, since it uses less digits than its factorization.

15961798359 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241 (or 213 counting only the distinct ones).

The product of its digits is 18370800, while the sum is 63.

The spelling of 15961798359 in words is "fifteen billion, nine hundred sixty-one million, seven hundred ninety-eight thousand, three hundred fifty-nine".