25206557753 has 12 divisors (see below), whose sum is σ = 27210203748. Its totient is φ = 23212283040.

The previous prime is 25206557699. The next prime is 25206557771. The reversal of 25206557753 is 35775560252.

It can be written as a sum of positive squares in 2 ways, for example, as 8661652624 + 16544905129 = 93068^2 + 128627^2 .

It is not a de Polignac number, because 25206557753 - 2³² = 20911590457 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 25206557698 and 25206557707.

It is not an unprimeable number, because it can be changed into a prime (25206557773) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2500343 + ... + 2510403.

It is an arithmetic number, because the mean of its divisors is an integer number (2267516979).

Almost surely, 2^25206557753 is an apocalyptic number.

It is an amenable number.

25206557753 is a deficient number, since it is larger than the sum of its proper divisors (2003645995).

25206557753 is an equidigital number, since it uses as much as digits as its factorization.

25206557753 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10952 (or 10513 counting only the distinct ones).

The product of its (nonzero) digits is 2205000, while the sum is 47.

The spelling of 25206557753 in words is "twenty-five billion, two hundred six million, five hundred fifty-seven thousand, seven hundred fifty-three".