16245987994 has 32 divisors (see below), whose sum is σ = 24730179264. Its totient is φ = 8003836800.

The previous prime is 16245987881. The next prime is 16245988021. The reversal of 16245987994 is 49978954261.

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, 27031294 + ... + 27031894.

It is an arithmetic number, because the mean of its divisors is an integer number (772818102).

Almost surely, 2^16245987994 is an apocalyptic number.

16245987994 is a deficient number, since it is larger than the sum of its proper divisors (8484191270).

16245987994 is a wasteful number, since it uses less digits than its factorization.

16245987994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1342.

The product of its digits is 39191040, while the sum is 64.

The spelling of 16245987994 in words is "sixteen billion, two hundred forty-five million, nine hundred eighty-seven thousand, nine hundred ninety-four".