15971382878 has 8 divisors (see below), whose sum is σ = 26134990200. Its totient is φ = 7259719480.

The previous prime is 15971382877. The next prime is 15971382893. The reversal of 15971382878 is 87828317951.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15971382877) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 362985953 + ... + 362985996.

It is an arithmetic number, because the mean of its divisors is an integer number (3266873775).

Almost surely, 2^15971382878 is an apocalyptic number.

15971382878 is a deficient number, since it is larger than the sum of its proper divisors (10163607322).

15971382878 is a wasteful number, since it uses less digits than its factorization.

15971382878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 725971962.

The product of its digits is 6773760, while the sum is 59.

The spelling of 15971382878 in words is "fifteen billion, nine hundred seventy-one million, three hundred eighty-two thousand, eight hundred seventy-eight".