15999920942 has 8 divisors (see below), whose sum is σ = 24774071232. Its totient is φ = 7741897200.

The previous prime is 15999920939. The next prime is 15999920971. The reversal of 15999920942 is 24902999951.

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

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, 129031559 + ... + 129031682.

It is an arithmetic number, because the mean of its divisors is an integer number (3096758904).

Almost surely, 2^15999920942 is an apocalyptic number.

15999920942 is a deficient number, since it is larger than the sum of its proper divisors (8774150290).

15999920942 is a wasteful number, since it uses less digits than its factorization.

15999920942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258063274.

The product of its (nonzero) digits is 4723920, while the sum is 59.

The spelling of 15999920942 in words is "fifteen billion, nine hundred ninety-nine million, nine hundred twenty thousand, nine hundred forty-two".