25383617661 has 8 divisors (see below), whose sum is σ = 33872638464. Its totient is φ = 16908504320.

The previous prime is 25383617641. The next prime is 25383617681. The reversal of 25383617661 is 16671638352.

It is an interprime number because it is at equal distance from previous prime (25383617641) and next prime (25383617681).

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 25383617661 - 2¹⁴ = 25383601277 is a prime.

It is a super-2 number, since 2×25383617661² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25383617661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25383617641) 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, 3472605 + ... + 3479906.

It is an arithmetic number, because the mean of its divisors is an integer number (4234079808).

Almost surely, 2^25383617661 is an apocalyptic number.

It is an amenable number.

25383617661 is a deficient number, since it is larger than the sum of its proper divisors (8489020803).

25383617661 is a wasteful number, since it uses less digits than its factorization.

25383617661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6953731.

The product of its digits is 1088640, while the sum is 48.

The spelling of 25383617661 in words is "twenty-five billion, three hundred eighty-three million, six hundred seventeen thousand, six hundred sixty-one".