28372271577 has 32 divisors (see below), whose sum is σ = 42108702720. Its totient is φ = 16874602560.

The previous prime is 28372271561. The next prime is 28372271623. The reversal of 28372271577 is 77517227382.

It is not a de Polignac number, because 28372271577 - 2⁴ = 28372271561 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28372271077) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 936574 + ... + 966392.

It is an arithmetic number, because the mean of its divisors is an integer number (1315896960).

Almost surely, 2^28372271577 is an apocalyptic number.

It is an amenable number.

28372271577 is a deficient number, since it is larger than the sum of its proper divisors (13736431143).

28372271577 is a wasteful number, since it uses less digits than its factorization.

28372271577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30653.

The product of its digits is 2304960, while the sum is 51.

The spelling of 28372271577 in words is "twenty-eight billion, three hundred seventy-two million, two hundred seventy-one thousand, five hundred seventy-seven".