13661151605025 has 12 divisors (see below), whose sum is σ = 22586437320432. Its totient is φ = 7285947522640.

The previous prime is 13661151605021. The next prime is 13661151605039. The reversal of 13661151605025 is 52050615116631.

It is not a de Polignac number, because 13661151605025 - 2² = 13661151605021 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13661151605021) 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, 91074343959 + ... + 91074344108.

It is an arithmetic number, because the mean of its divisors is an integer number (1882203110036).

Almost surely, 2^{13661151605025} is an apocalyptic number.

13661151605025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13661151605025 is a deficient number, since it is larger than the sum of its proper divisors (8925285715407).

13661151605025 is a wasteful number, since it uses less digits than its factorization.

13661151605025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182148688080 (or 182148688075 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 42.

The spelling of 13661151605025 in words is "thirteen trillion, six hundred sixty-one billion, one hundred fifty-one million, six hundred five thousand, twenty-five".