25255402501 has 8 divisors (see below), whose sum is σ = 28868118464. Its totient is φ = 21643886880.

The previous prime is 25255402489. The next prime is 25255402511. The reversal of 25255402501 is 10520455252.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25255402501 - 2⁷ = 25255402373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25255402511) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 254535 + ... + 339556.

It is an arithmetic number, because the mean of its divisors is an integer number (3608514808).

Almost surely, 2^25255402501 is an apocalyptic number.

It is an amenable number.

25255402501 is a deficient number, since it is larger than the sum of its proper divisors (3612715963).

25255402501 is an equidigital number, since it uses as much as digits as its factorization.

25255402501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 600171.

The product of its (nonzero) digits is 20000, while the sum is 31.

Adding to 25255402501 its reverse (10520455252), we get a palindrome (35775857753).

The spelling of 25255402501 in words is "twenty-five billion, two hundred fifty-five million, four hundred two thousand, five hundred one".