15963491745 has 40 divisors (see below), whose sum is σ = 28693027176. Its totient is φ = 8490956544.

The previous prime is 15963491743. The next prime is 15963491779. The reversal of 15963491745 is 54719436951.

15963491745 is a `hidden beast` number, since 1 + 59 + 63 + 491 + 7 + 45 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 3844124001 + 12119367744 = 62001^2 + 110088^2 .

It is not a de Polignac number, because 15963491745 - 2¹ = 15963491743 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 15963491691 and 15963491700.

It is not an unprimeable number, because it can be changed into a prime (15963491743) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 98229 + ... + 203901.

Almost surely, 2^15963491745 is an apocalyptic number.

15963491745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

15963491745 is a deficient number, since it is larger than the sum of its proper divisors (12729535431).

15963491745 is a wasteful number, since it uses less digits than its factorization.

15963491745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106063 (or 106054 counting only the distinct ones).

The product of its digits is 4082400, while the sum is 54.

The spelling of 15963491745 in words is "fifteen billion, nine hundred sixty-three million, four hundred ninety-one thousand, seven hundred forty-five".