15997617630 has 48 divisors (see below), whose sum is σ = 41600154960. Its totient is φ = 4265380224.

The previous prime is 15997617607. The next prime is 15997617659. The reversal of 15997617630 is 3671679951.

It is a happy number.

15997617630 is a `hidden beast` number, since 1 + 599 + 7 + 6 + 17 + 6 + 30 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 987274 + ... + 1003346.

It is an arithmetic number, because the mean of its divisors is an integer number (866669895).

Almost surely, 2^15997617630 is an apocalyptic number.

15997617630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

15997617630 is an abundant number, since it is smaller than the sum of its proper divisors (25602537330).

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

15997617630 is a wasteful number, since it uses less digits than its factorization.

15997617630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27145 (or 27142 counting only the distinct ones).

The product of its (nonzero) digits is 2143260, while the sum is 54.

The spelling of 15997617630 in words is "fifteen billion, nine hundred ninety-seven million, six hundred seventeen thousand, six hundred thirty".