13661528975 has 6 divisors (see below), whose sum is σ = 16940295960. Its totient is φ = 10929223160.

The previous prime is 13661528953. The next prime is 13661528977. The reversal of 13661528975 is 57982516631.

It is a happy number.

It is not a de Polignac number, because 13661528975 - 2²⁰ = 13660480399 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13661528977) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 273230555 + ... + 273230604.

It is an arithmetic number, because the mean of its divisors is an integer number (2823382660).

Almost surely, 2^13661528975 is an apocalyptic number.

13661528975 is a deficient number, since it is larger than the sum of its proper divisors (3278766985).

13661528975 is an equidigital number, since it uses as much as digits as its factorization.

13661528975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 546461169 (or 546461164 counting only the distinct ones).

The product of its digits is 2721600, while the sum is 53.

The spelling of 13661528975 in words is "thirteen billion, six hundred sixty-one million, five hundred twenty-eight thousand, nine hundred seventy-five".