28725372518 has 4 divisors (see below), whose sum is σ = 43088058780. Its totient is φ = 14362686258.

The previous prime is 28725372499. The next prime is 28725372521. The reversal of 28725372518 is 81527352782.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7181343128 + ... + 7181343131.

It is an arithmetic number, because the mean of its divisors is an integer number (10772014695).

Almost surely, 2^28725372518 is an apocalyptic number.

28725372518 is a deficient number, since it is larger than the sum of its proper divisors (14362686262).

28725372518 is a wasteful number, since it uses less digits than its factorization.

28725372518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14362686261.

The product of its digits is 1881600, while the sum is 50.

The spelling of 28725372518 in words is "twenty-eight billion, seven hundred twenty-five million, three hundred seventy-two thousand, five hundred eighteen".