16020237878517 has 32 divisors (see below), whose sum is σ = 21796525449216. Its totient is φ = 10464517641600.

The previous prime is 16020237878509. The next prime is 16020237878537. The reversal of 16020237878517 is 71587873202061.

It is not a de Polignac number, because 16020237878517 - 2³ = 16020237878509 is a prime.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16020237878537) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15233193 + ... + 16250865.

It is an arithmetic number, because the mean of its divisors is an integer number (681141420288).

Almost surely, 2^{16020237878517} is an apocalyptic number.

It is an amenable number.

16020237878517 is a deficient number, since it is larger than the sum of its proper divisors (5776287570699).

16020237878517 is a wasteful number, since it uses less digits than its factorization.

16020237878517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1018281.

The product of its (nonzero) digits is 7902720, while the sum is 57.

The spelling of 16020237878517 in words is "sixteen trillion, twenty billion, two hundred thirty-seven million, eight hundred seventy-eight thousand, five hundred seventeen".