15905042542 has 16 divisors (see below), whose sum is σ = 23946435072. Its totient is φ = 7922953080.

The previous prime is 15905042513. The next prime is 15905042551. The reversal of 15905042542 is 24524050951.

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, 582733 + ... + 609415.

It is an arithmetic number, because the mean of its divisors is an integer number (1496652192).

Almost surely, 2^15905042542 is an apocalyptic number.

15905042542 is a deficient number, since it is larger than the sum of its proper divisors (8041392530).

15905042542 is a wasteful number, since it uses less digits than its factorization.

15905042542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27783.

The product of its (nonzero) digits is 72000, while the sum is 37.

The spelling of 15905042542 in words is "fifteen billion, nine hundred five million, forty-two thousand, five hundred forty-two".