25087197953 has 4 divisors (see below), whose sum is σ = 25087549188. Its totient is φ = 25086846720.

The previous prime is 25087197929. The next prime is 25087197983. The reversal of 25087197953 is 35979178052.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11665512049 + 13421685904 = 108007^2 + 115852^2 .

It is a cyclic number.

It is not a de Polignac number, because 25087197953 - 2⁸ = 25087197697 is a prime.

It is a super-2 number, since 2×25087197953² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25087197983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25976 + ... + 225497.

It is an arithmetic number, because the mean of its divisors is an integer number (6271887297).

Almost surely, 2^25087197953 is an apocalyptic number.

It is an amenable number.

25087197953 is a deficient number, since it is larger than the sum of its proper divisors (351235).

25087197953 is an equidigital number, since it uses as much as digits as its factorization.

25087197953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351234.

The product of its (nonzero) digits is 4762800, while the sum is 56.

The spelling of 25087197953 in words is "twenty-five billion, eighty-seven million, one hundred ninety-seven thousand, nine hundred fifty-three".