25405243000 has 64 divisors (see below), whose sum is σ = 59628647520. Its totient is φ = 10131264000.

The previous prime is 25405242997. The next prime is 25405243013. The reversal of 25405243000 is 34250452.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 292624 + ... + 369376.

Almost surely, 2^25405243000 is an apocalyptic number.

25405243000 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 25405243000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29814323760).

25405243000 is an abundant number, since it is smaller than the sum of its proper divisors (34223404520).

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

25405243000 is a wasteful number, since it uses less digits than its factorization.

25405243000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77105 (or 77091 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 25.

Adding to 25405243000 its reverse (34250452), we get a palindrome (25439493452).

The spelling of 25405243000 in words is "twenty-five billion, four hundred five million, two hundred forty-three thousand".