28545416825 has 12 divisors (see below), whose sum is σ = 35398628688. Its totient is φ = 22834842000.

The previous prime is 28545416819. The next prime is 28545416827. The reversal of 28545416825 is 52861454582.

It is a happy number.

It is not a de Polignac number, because 28545416825 - 2⁸ = 28545416569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28545416827) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 511550 + ... + 564600.

It is an arithmetic number, because the mean of its divisors is an integer number (2949885724).

Almost surely, 2^28545416825 is an apocalyptic number.

28545416825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28545416825 is a deficient number, since it is larger than the sum of its proper divisors (6853211863).

28545416825 is a wasteful number, since it uses less digits than its factorization.

28545416825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74584 (or 74579 counting only the distinct ones).

The product of its digits is 3072000, while the sum is 50.

The spelling of 28545416825 in words is "twenty-eight billion, five hundred forty-five million, four hundred sixteen thousand, eight hundred twenty-five".