15963491744 has 48 divisors (see below), whose sum is σ = 33102276480. Its totient is φ = 7557073920.

The previous prime is 15963491743. The next prime is 15963491779. The reversal of 15963491744 is 44719436951.

It is a happy number.

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 7 ways as a sum of consecutive naturals, for example, 1130552 + ... + 1144584.

It is an arithmetic number, because the mean of its divisors is an integer number (689630760).

Almost surely, 2^15963491744 is an apocalyptic number.

It is an amenable number.

15963491744 is an abundant number, since it is smaller than the sum of its proper divisors (17138784736).

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

15963491744 is a wasteful number, since it uses less digits than its factorization.

15963491744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15933 (or 15925 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 53.

The spelling of 15963491744 in words is "fifteen billion, nine hundred sixty-three million, four hundred ninety-one thousand, seven hundred forty-four".