15850318849 has 16 divisors (see below), whose sum is σ = 16970204160. Its totient is φ = 14752166400.

The previous prime is 15850318843. The next prime is 15850318859. The reversal of 15850318849 is 94881305851.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15850318849 is a prime.

It is a super-2 number, since 2×15850318849² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 15850318796 and 15850318805.

It is not an unprimeable number, because it can be changed into a prime (15850318843) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 558597 + ... + 586285.

It is an arithmetic number, because the mean of its divisors is an integer number (1060637760).

Almost surely, 2^15850318849 is an apocalyptic number.

It is an amenable number.

15850318849 is a deficient number, since it is larger than the sum of its proper divisors (1119885311).

15850318849 is a wasteful number, since it uses less digits than its factorization.

15850318849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28080.

The product of its (nonzero) digits is 1382400, while the sum is 52.

The spelling of 15850318849 in words is "fifteen billion, eight hundred fifty million, three hundred eighteen thousand, eight hundred forty-nine".