25654242515 has 8 divisors (see below), whose sum is σ = 33583735728. Its totient is φ = 18657630880.

The previous prime is 25654242511. The next prime is 25654242517. The reversal of 25654242515 is 51524245652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25654242515 - 2² = 25654242511 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25654242511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 233220332 + ... + 233220441.

It is an arithmetic number, because the mean of its divisors is an integer number (4197966966).

Almost surely, 2^25654242515 is an apocalyptic number.

25654242515 is a deficient number, since it is larger than the sum of its proper divisors (7929493213).

25654242515 is a wasteful number, since it uses less digits than its factorization.

25654242515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 466440789.

The product of its digits is 480000, while the sum is 41.

The spelling of 25654242515 in words is "twenty-five billion, six hundred fifty-four million, two hundred forty-two thousand, five hundred fifteen".