25285132513 has 4 divisors (see below), whose sum is σ = 25286638000. Its totient is φ = 25283627028.

The previous prime is 25285132511. The next prime is 25285132519. The reversal of 25285132513 is 31523158252.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25285132513 - 2¹ = 25285132511 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25285132511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 727263 + ... + 761236.

It is an arithmetic number, because the mean of its divisors is an integer number (6321659500).

Almost surely, 2^25285132513 is an apocalyptic number.

It is an amenable number.

25285132513 is a deficient number, since it is larger than the sum of its proper divisors (1505487).

25285132513 is a wasteful number, since it uses less digits than its factorization.

25285132513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1505486.

The product of its digits is 72000, while the sum is 37.

The spelling of 25285132513 in words is "twenty-five billion, two hundred eighty-five million, one hundred thirty-two thousand, five hundred thirteen".