25402105000 has 80 divisors (see below), whose sum is σ = 60640729380. Its totient is φ = 9969024000.

The previous prime is 25402104989. The next prime is 25402105009. The reversal of 25402105000 is 50120452.

It can be written as a sum of positive squares in 10 ways, for example, as 4093696324 + 21308408676 = 63982^2 + 145974^2 .

It is not an unprimeable number, because it can be changed into a prime (25402105009) 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 19 ways as a sum of consecutive naturals, for example, 217072 + ... + 312928.

Almost surely, 2^25402105000 is an apocalyptic number.

25402105000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25402105000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30320364690).

25402105000 is an abundant number, since it is smaller than the sum of its proper divisors (35238624380).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25402105000 is an equidigital number, since it uses as much as digits as its factorization.

25402105000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95936 (or 95917 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 19.

Adding to 25402105000 its reverse (50120452), we get a palindrome (25452225452).

The spelling of 25402105000 in words is "twenty-five billion, four hundred two million, one hundred five thousand".