16389786542 has 16 divisors (see below), whose sum is σ = 24733874880. Its totient is φ = 8145244128.

The previous prime is 16389786503. The next prime is 16389786551. The reversal of 16389786542 is 24568798361.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 389348 + ... + 429384.

It is an arithmetic number, because the mean of its divisors is an integer number (1545867180).

Almost surely, 2^16389786542 is an apocalyptic number.

16389786542 is a deficient number, since it is larger than the sum of its proper divisors (8344088338).

16389786542 is a wasteful number, since it uses less digits than its factorization.

16389786542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41275.

The product of its digits is 17418240, while the sum is 59.

The spelling of 16389786542 in words is "sixteen billion, three hundred eighty-nine million, seven hundred eighty-six thousand, five hundred forty-two".