25507578253 has 8 divisors (see below), whose sum is σ = 25796273400. Its totient is φ = 25219987968.

The previous prime is 25507578221. The next prime is 25507578263. The reversal of 25507578253 is 35287570552.

It can be written as a sum of positive squares in 4 ways, for example, as 5134868964 + 20372709289 = 71658^2 + 142733^2 .

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 25507578253 - 2⁵ = 25507578221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25507578197 and 25507578206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25507578263) 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, 229738 + ... + 322171.

It is an arithmetic number, because the mean of its divisors is an integer number (3224534175).

Almost surely, 2^25507578253 is an apocalyptic number.

It is an amenable number.

25507578253 is a deficient number, since it is larger than the sum of its proper divisors (288695147).

25507578253 is a wasteful number, since it uses less digits than its factorization.

25507578253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 552431.

The product of its (nonzero) digits is 2940000, while the sum is 49.

The spelling of 25507578253 in words is "twenty-five billion, five hundred seven million, five hundred seventy-eight thousand, two hundred fifty-three".