28572540777 has 40 divisors (see below), whose sum is σ = 46579927680. Its totient is φ = 17310270240.

The previous prime is 28572540767. The next prime is 28572540791. The reversal of 28572540777 is 77704527582.

28572540777 is a `hidden beast` number, since 28 + 5 + 7 + 2 + 540 + 7 + 77 = 666.

It is not a de Polignac number, because 28572540777 - 2⁴ = 28572540761 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28572540767) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 3678624 + ... + 3686382.

It is an arithmetic number, because the mean of its divisors is an integer number (1164498192).

Almost surely, 2^28572540777 is an apocalyptic number.

28572540777 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

28572540777 is a deficient number, since it is larger than the sum of its proper divisors (18007386903).

28572540777 is a wasteful number, since it uses less digits than its factorization.

28572540777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11915 (or 11906 counting only the distinct ones).

The product of its (nonzero) digits is 7683200, while the sum is 54.

The spelling of 28572540777 in words is "twenty-eight billion, five hundred seventy-two million, five hundred forty thousand, seven hundred seventy-seven".