28077157715 has 8 divisors (see below), whose sum is σ = 34779447168. Its totient is φ = 21737154240.

The previous prime is 28077157637. The next prime is 28077157753. The reversal of 28077157715 is 51775177082.

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

It is not a de Polignac number, because 28077157715 - 2¹⁶ = 28077092179 is a prime.

It is a Duffinian 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, 90571322 + ... + 90571631.

It is an arithmetic number, because the mean of its divisors is an integer number (4347430896).

Almost surely, 2^28077157715 is an apocalyptic number.

28077157715 is a deficient number, since it is larger than the sum of its proper divisors (6702289453).

28077157715 is a wasteful number, since it uses less digits than its factorization.

28077157715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181142989.

The product of its (nonzero) digits is 960400, while the sum is 50.

The spelling of 28077157715 in words is "twenty-eight billion, seventy-seven million, one hundred fifty-seven thousand, seven hundred fifteen".