12503435525 has 12 divisors (see below), whose sum is σ = 17719154592. Its totient is φ = 8573784240.

The previous prime is 12503435501. The next prime is 12503435531. The reversal of 12503435525 is 52553430521.

It is not a de Polignac number, because 12503435525 - 2¹⁸ = 12503173381 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

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, 35723927 + ... + 35724276.

It is an arithmetic number, because the mean of its divisors is an integer number (1476596216).

Almost surely, 2^12503435525 is an apocalyptic number.

It is an amenable number.

12503435525 is a deficient number, since it is larger than the sum of its proper divisors (5215719067).

12503435525 is an equidigital number, since it uses as much as digits as its factorization.

12503435525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71448220 (or 71448215 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 35.

The spelling of 12503435525 in words is "twelve billion, five hundred three million, four hundred thirty-five thousand, five hundred twenty-five".