25494180613 has 16 divisors (see below), whose sum is σ = 29072424960. Its totient is φ = 22144964400.

The previous prime is 25494180541. The next prime is 25494180617. The reversal of 25494180613 is 31608149452.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25494180613 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25494180613.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25494180617) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 446245 + ... + 500122.

It is an arithmetic number, because the mean of its divisors is an integer number (1817026560).

Almost surely, 2^25494180613 is an apocalyptic number.

It is an amenable number.

25494180613 is a deficient number, since it is larger than the sum of its proper divisors (3578244347).

25494180613 is a wasteful number, since it uses less digits than its factorization.

25494180613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 946488.

The product of its (nonzero) digits is 207360, while the sum is 43.

The spelling of 25494180613 in words is "twenty-five billion, four hundred ninety-four million, one hundred eighty thousand, six hundred thirteen".