15951916671868 has 12 divisors (see below), whose sum is σ = 27915918637320. Its totient is φ = 7975939918352.

The previous prime is 15951916671839. The next prime is 15951916671947. The reversal of 15951916671868 is 86817661915951.

It is a self number, because there is not a number n which added to its sum of digits gives 15951916671868.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2554183 + ... + 6199006.

It is an arithmetic number, because the mean of its divisors is an integer number (2326326553110).

Almost surely, 2^{15951916671868} is an apocalyptic number.

It is an amenable number.

15951916671868 is a deficient number, since it is larger than the sum of its proper divisors (11964001965452).

15951916671868 is a wasteful number, since it uses less digits than its factorization.

15951916671868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9208796 (or 9208794 counting only the distinct ones).

The product of its digits is 195955200, while the sum is 73.

The spelling of 15951916671868 in words is "fifteen trillion, nine hundred fifty-one billion, nine hundred sixteen million, six hundred seventy-one thousand, eight hundred sixty-eight".