25255402502 has 64 divisors (see below), whose sum is σ = 43244997120. Its totient is φ = 10960012800.

The previous prime is 25255402489. The next prime is 25255402511. The reversal of 25255402502 is 20520455252.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 16960574 + ... + 16962062.

It is an arithmetic number, because the mean of its divisors is an integer number (675703080).

Almost surely, 2^25255402502 is an apocalyptic number.

25255402502 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

25255402502 is a deficient number, since it is larger than the sum of its proper divisors (17989594618).

25255402502 is a wasteful number, since it uses less digits than its factorization.

25255402502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1917.

The product of its (nonzero) digits is 40000, while the sum is 32.

Adding to 25255402502 its reverse (20520455252), we get a palindrome (45775857754).

The spelling of 25255402502 in words is "twenty-five billion, two hundred fifty-five million, four hundred two thousand, five hundred two".