25299215616 has 144 divisors (see below), whose sum is σ = 71074785600. Its totient is φ = 7966900224.

The previous prime is 25299215609. The next prime is 25299215629. The reversal of 25299215616 is 61651299252.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 5674060 + ... + 5678516.

It is an arithmetic number, because the mean of its divisors is an integer number (493574900).

Almost surely, 2^25299215616 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25299215616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35537392800).

25299215616 is an abundant number, since it is smaller than the sum of its proper divisors (45775569984).

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

25299215616 is a wasteful number, since it uses less digits than its factorization.

25299215616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4884 (or 4870 counting only the distinct ones).

The product of its digits is 583200, while the sum is 48.

The spelling of 25299215616 in words is "twenty-five billion, two hundred ninety-nine million, two hundred fifteen thousand, six hundred sixteen".