25420691659 has 8 divisors (see below), whose sum is σ = 27856023552. Its totient is φ = 23006086440.

The previous prime is 25420691657. The next prime is 25420691671. The reversal of 25420691659 is 95619602452.

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

It is a cyclic number.

It is not a de Polignac number, because 25420691659 - 2¹ = 25420691657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25420691657) 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, 5179099 + ... + 5184004.

It is an arithmetic number, because the mean of its divisors is an integer number (3482002944).

Almost surely, 2^25420691659 is an apocalyptic number.

25420691659 is a deficient number, since it is larger than the sum of its proper divisors (2435331893).

25420691659 is a wasteful number, since it uses less digits than its factorization.

25420691659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10363337.

The product of its (nonzero) digits is 1166400, while the sum is 49.

The spelling of 25420691659 in words is "twenty-five billion, four hundred twenty million, six hundred ninety-one thousand, six hundred fifty-nine".