25229496864 has 384 divisors, whose sum is σ = 82484075520. Its totient is φ = 6638284800.

The previous prime is 25229496863. The next prime is 25229496871. The reversal of 25229496864 is 46869492252.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is not an unprimeable number, because it can be changed into a prime (25229496863) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 51383659 + ... + 51384149.

It is an arithmetic number, because the mean of its divisors is an integer number (214802280).

Almost surely, 2^25229496864 is an apocalyptic number.

25229496864 is a gapful number since it is divisible by the number (24) 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 25229496864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41242037760).

25229496864 is an abundant number, since it is smaller than the sum of its proper divisors (57254578656).

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

25229496864 is a wasteful number, since it uses less digits than its factorization.

25229496864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 744 (or 736 counting only the distinct ones).

The product of its digits is 14929920, while the sum is 57.

The spelling of 25229496864 in words is "twenty-five billion, two hundred twenty-nine million, four hundred ninety-six thousand, eight hundred sixty-four".