28519077657 has 64 divisors (see below), whose sum is σ = 46358528000. Its totient is φ = 15569910720.

The previous prime is 28519077641. The next prime is 28519077661. The reversal of 28519077657 is 75677091582.

It is a happy number.

It is not a de Polignac number, because 28519077657 - 2⁴ = 28519077641 is a prime.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28519077597 and 28519077606.

It is not an unprimeable number, because it can be changed into a prime (28519077607) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2514363 + ... + 2525679.

It is an arithmetic number, because the mean of its divisors is an integer number (724352000).

Almost surely, 2^28519077657 is an apocalyptic number.

It is an amenable number.

28519077657 is a deficient number, since it is larger than the sum of its proper divisors (17839450343).

28519077657 is a wasteful number, since it uses less digits than its factorization.

28519077657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11451 (or 11437 counting only the distinct ones).

The product of its (nonzero) digits is 7408800, while the sum is 57.

The spelling of 28519077657 in words is "twenty-eight billion, five hundred nineteen million, seventy-seven thousand, six hundred fifty-seven".