28556245965 has 32 divisors (see below), whose sum is σ = 49213866240. Its totient is φ = 14055814656.

The previous prime is 28556245957. The next prime is 28556245967. The reversal of 28556245965 is 56954265582.

It is not a de Polignac number, because 28556245965 - 2³ = 28556245957 is a prime.

It is a super-2 number, since 2×28556245965² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28556245967) 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, 1392456 + ... + 1412814.

It is an arithmetic number, because the mean of its divisors is an integer number (1537933320).

Almost surely, 2^28556245965 is an apocalyptic number.

It is an amenable number.

28556245965 is a deficient number, since it is larger than the sum of its proper divisors (20657620275).

28556245965 is a wasteful number, since it uses less digits than its factorization.

28556245965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27573.

The product of its digits is 25920000, while the sum is 57.

The spelling of 28556245965 in words is "twenty-eight billion, five hundred fifty-six million, two hundred forty-five thousand, nine hundred sixty-five".