25235413653 has 4 divisors (see below), whose sum is σ = 33647218208. Its totient is φ = 16823609100.

The previous prime is 25235413607. The next prime is 25235413657. The reversal of 25235413653 is 35631453252.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 25235413653 - 2⁶ = 25235413589 is a prime.

It is a super-2 number, since 2×25235413653² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25235413657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4205902273 + ... + 4205902278.

It is an arithmetic number, because the mean of its divisors is an integer number (8411804552).

Almost surely, 2^25235413653 is an apocalyptic number.

It is an amenable number.

25235413653 is a deficient number, since it is larger than the sum of its proper divisors (8411804555).

25235413653 is an equidigital number, since it uses as much as digits as its factorization.

25235413653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8411804554.

The product of its digits is 324000, while the sum is 39.

The spelling of 25235413653 in words is "twenty-five billion, two hundred thirty-five million, four hundred thirteen thousand, six hundred fifty-three".