15438758242 has 16 divisors (see below), whose sum is σ = 23333391072. Its totient is φ = 7660991520.

The previous prime is 15438758213. The next prime is 15438758261. The reversal of 15438758242 is 24285783451.

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, 2026813 + ... + 2034415.

It is an arithmetic number, because the mean of its divisors is an integer number (1458336942).

Almost surely, 2^15438758242 is an apocalyptic number.

15438758242 is a deficient number, since it is larger than the sum of its proper divisors (7894632830).

15438758242 is a wasteful number, since it uses less digits than its factorization.

15438758242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15153.

The product of its digits is 2150400, while the sum is 49.

The spelling of 15438758242 in words is "fifteen billion, four hundred thirty-eight million, seven hundred fifty-eight thousand, two hundred forty-two".