27813968525 has 12 divisors (see below), whose sum is σ = 39416367072. Its totient is φ = 19072435440.

The previous prime is 27813968519. The next prime is 27813968531. The reversal of 27813968525 is 52586931872.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (27813968519) and next prime (27813968531).

It is not a de Polignac number, because 27813968525 - 2⁴ = 27813968509 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 79468307 + ... + 79468656.

It is an arithmetic number, because the mean of its divisors is an integer number (3284697256).

Almost surely, 2^27813968525 is an apocalyptic number.

27813968525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

27813968525 is a deficient number, since it is larger than the sum of its proper divisors (11602398547).

27813968525 is a wasteful number, since it uses less digits than its factorization.

27813968525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158936980 (or 158936975 counting only the distinct ones).

The product of its digits is 7257600, while the sum is 56.

The spelling of 27813968525 in words is "twenty-seven billion, eight hundred thirteen million, nine hundred sixty-eight thousand, five hundred twenty-five".