28547524775 has 96 divisors (see below), whose sum is σ = 45334384128. Its totient is φ = 17315020800.

The previous prime is 28547524769. The next prime is 28547524781. The reversal of 28547524775 is 57742574582.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (28547524769) and next prime (28547524781).

It is not a de Polignac number, because 28547524775 - 2²⁴ = 28530747559 is a prime.

It is a super-2 number, since 2×28547524775² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28547524775.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 29219087 + ... + 29220063.

It is an arithmetic number, because the mean of its divisors is an integer number (472233168).

Almost surely, 2^28547524775 is an apocalyptic number.

28547524775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28547524775 is a deficient number, since it is larger than the sum of its proper divisors (16786859353).

28547524775 is a wasteful number, since it uses less digits than its factorization.

28547524775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1401 (or 1396 counting only the distinct ones).

The product of its digits is 21952000, while the sum is 56.

The spelling of 28547524775 in words is "twenty-eight billion, five hundred forty-seven million, five hundred twenty-four thousand, seven hundred seventy-five".