23525405661 has 8 divisors (see below), whose sum is σ = 31418380000. Its totient is φ = 15658017552.

The previous prime is 23525405653. The next prime is 23525405669. The reversal of 23525405661 is 16650452532.

It is an interprime number because it is at equal distance from previous prime (23525405653) and next prime (23525405669).

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

It is not a de Polignac number, because 23525405661 - 2³ = 23525405653 is a prime.

It is a super-2 number, since 2×23525405661² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23525405669) 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, 6394411 + ... + 6398088.

It is an arithmetic number, because the mean of its divisors is an integer number (3927297500).

Almost surely, 2^23525405661 is an apocalyptic number.

It is an amenable number.

23525405661 is a deficient number, since it is larger than the sum of its proper divisors (7892974339).

23525405661 is a wasteful number, since it uses less digits than its factorization.

23525405661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12793115.

The product of its (nonzero) digits is 216000, while the sum is 39.

The spelling of 23525405661 in words is "twenty-three billion, five hundred twenty-five million, four hundred five thousand, six hundred sixty-one".