15940806198 has 64 divisors (see below), whose sum is σ = 32741210880. Its totient is φ = 5172659712.

The previous prime is 15940806169. The next prime is 15940806229. The reversal of 15940806198 is 89160804951.

It is a self number, because there is not a number n which added to its sum of digits gives 15940806198.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20254761 + ... + 20255547.

It is an arithmetic number, because the mean of its divisors is an integer number (511581420).

Almost surely, 2^15940806198 is an apocalyptic number.

15940806198 is an abundant number, since it is smaller than the sum of its proper divisors (16800404682).

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

15940806198 is a wasteful number, since it uses less digits than its factorization.

15940806198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1421.

The product of its (nonzero) digits is 622080, while the sum is 51.

The spelling of 15940806198 in words is "fifteen billion, nine hundred forty million, eight hundred six thousand, one hundred ninety-eight".