12505427436525 has 24 divisors (see below), whose sum is σ = 20675783656224. Its totient is φ = 6669514968000.

The previous prime is 12505427436479. The next prime is 12505427436553. The reversal of 12505427436525 is 52563472450521.

It is a happy number.

It is not a de Polignac number, because 12505427436525 - 2³⁵ = 12471067698157 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12138907 + ... + 13128743.

It is an arithmetic number, because the mean of its divisors is an integer number (861490985676).

Almost surely, 2^{12505427436525} is an apocalyptic number.

12505427436525 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12505427436525 is a deficient number, since it is larger than the sum of its proper divisors (8170356219699).

12505427436525 is a wasteful number, since it uses less digits than its factorization.

12505427436525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1158301 (or 1158296 counting only the distinct ones).

The product of its (nonzero) digits is 10080000, while the sum is 51.

The spelling of 12505427436525 in words is "twelve trillion, five hundred five billion, four hundred twenty-seven million, four hundred thirty-six thousand, five hundred twenty-five".