25436229120 has 480 divisors, whose sum is σ = 94373959680. Its totient is φ = 6559211520.

The previous prime is 25436229113. The next prime is 25436229131. The reversal of 25436229120 is 2192263452.

25436229120 is a `hidden beast` number, since 2 + 5 + 4 + 3 + 622 + 9 + 1 + 20 = 666.

It is a tau number, because it is divible by the number of its divisors (480).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 19283821 + ... + 19285139.

It is an arithmetic number, because the mean of its divisors is an integer number (196612416).

Almost surely, 2^25436229120 is an apocalyptic number.

25436229120 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 25436229120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47186979840).

25436229120 is an abundant number, since it is smaller than the sum of its proper divisors (68937730560).

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

25436229120 is an equidigital number, since it uses as much as digits as its factorization.

25436229120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1388 (or 1360 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The spelling of 25436229120 in words is "twenty-five billion, four hundred thirty-six million, two hundred twenty-nine thousand, one hundred twenty".