25641414653 has 8 divisors (see below), whose sum is σ = 27154046520. Its totient is φ = 24129262080.

The previous prime is 25641414649. The next prime is 25641414661. The reversal of 25641414653 is 35641414652.

It can be written as a sum of positive squares in 4 ways, for example, as 463024324 + 25178390329 = 21518^2 + 158677^2 .

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 25641414653 - 2² = 25641414649 is a prime.

It is a super-2 number, since 2×25641414653² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25641414653.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25641414053) 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, 6608 + ... + 226553.

It is an arithmetic number, because the mean of its divisors is an integer number (3394255815).

Almost surely, 2^25641414653 is an apocalyptic number.

It is an amenable number.

25641414653 is a deficient number, since it is larger than the sum of its proper divisors (1512631867).

25641414653 is a wasteful number, since it uses less digits than its factorization.

25641414653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239647.

The product of its digits is 345600, while the sum is 41.

Subtracting 25641414653 from its reverse (35641414652), we obtain a palindrome (9999999999).

The spelling of 25641414653 in words is "twenty-five billion, six hundred forty-one million, four hundred fourteen thousand, six hundred fifty-three".