25295989950 has 288 divisors, whose sum is σ = 88418483712. Its totient is φ = 5027616000.

The previous prime is 25295989931. The next prime is 25295989951. The reversal of 25295989950 is 5998959252.

25295989950 is a `hidden beast` number, since 2 + 529 + 59 + 8 + 9 + 9 + 50 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25295989951) by changing a digit.

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 143 ways as a sum of consecutive naturals, for example, 781080 + ... + 812820.

It is an arithmetic number, because the mean of its divisors is an integer number (307008624).

Almost surely, 2^25295989950 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25295989950, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44209241856).

25295989950 is an abundant number, since it is smaller than the sum of its proper divisors (63122493762).

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

25295989950 is a wasteful number, since it uses less digits than its factorization.

25295989950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31800 (or 31792 counting only the distinct ones).

The product of its (nonzero) digits is 26244000, while the sum is 63.

The spelling of 25295989950 in words is "twenty-five billion, two hundred ninety-five million, nine hundred eighty-nine thousand, nine hundred fifty".