28915137915 has 8 divisors (see below), whose sum is σ = 46264220688. Its totient is φ = 15421406880.

The previous prime is 28915137887. The next prime is 28915137917. The reversal of 28915137915 is 51973151982.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28915137915 - 2⁷ = 28915137787 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28915137917) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 963837916 + ... + 963837945.

It is an arithmetic number, because the mean of its divisors is an integer number (5783027586).

Almost surely, 2^28915137915 is an apocalyptic number.

28915137915 is a deficient number, since it is larger than the sum of its proper divisors (17349082773).

28915137915 is a wasteful number, since it uses less digits than its factorization.

28915137915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1927675869.

The product of its digits is 680400, while the sum is 51.

The spelling of 28915137915 in words is "twenty-eight billion, nine hundred fifteen million, one hundred thirty-seven thousand, nine hundred fifteen".