16020879643978 has 32 divisors (see below), whose sum is σ = 26436087982080. Its totient is φ = 7221137636160.

The previous prime is 16020879643919. The next prime is 16020879643987. The reversal of 16020879643978 is 87934697802061.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3917608 + ... + 6883996.

It is an arithmetic number, because the mean of its divisors is an integer number (826127749440).

Almost surely, 2^{16020879643978} is an apocalyptic number.

16020879643978 is a deficient number, since it is larger than the sum of its proper divisors (10415208338102).

16020879643978 is a wasteful number, since it uses less digits than its factorization.

16020879643978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2968462.

The product of its (nonzero) digits is 219469824, while the sum is 70.

The spelling of 16020879643978 in words is "sixteen trillion, twenty billion, eight hundred seventy-nine million, six hundred forty-three thousand, nine hundred seventy-eight".