15870313998 has 96 divisors (see below), whose sum is σ = 42911960832. Its totient is φ = 4118169600.

The previous prime is 15870313997. The next prime is 15870314171. The reversal of 15870313998 is 89931307851.

15870313998 is a `hidden beast` number, since 158 + 70 + 31 + 399 + 8 = 666.

It is a super-2 number, since 2×15870313998² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15870313993) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1593093 + ... + 1603023.

It is an arithmetic number, because the mean of its divisors is an integer number (446999592).

Almost surely, 2^15870313998 is an apocalyptic number.

15870313998 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 15870313998, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21455980416).

15870313998 is an abundant number, since it is smaller than the sum of its proper divisors (27041646834).

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

15870313998 is a wasteful number, since it uses less digits than its factorization.

15870313998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11110 (or 11107 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 54.

The spelling of 15870313998 in words is "fifteen billion, eight hundred seventy million, three hundred thirteen thousand, nine hundred ninety-eight".