25168292772 has 144 divisors (see below), whose sum is σ = 74230087680. Its totient is φ = 6592622400.

The previous prime is 25168292749. The next prime is 25168292789. The reversal of 25168292772 is 27729286152.

It is a super-2 number, since 2×25168292772² (a number of 22 digits) contains 22 as substring.

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, 309997 + ... + 382667.

It is an arithmetic number, because the mean of its divisors is an integer number (515486720).

Almost surely, 2^25168292772 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 25168292772, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37115043840).

25168292772 is an abundant number, since it is smaller than the sum of its proper divisors (49061794908).

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

25168292772 is a wasteful number, since it uses less digits than its factorization.

25168292772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72742 (or 72733 counting only the distinct ones).

The product of its digits is 1693440, while the sum is 51.

The spelling of 25168292772 in words is "twenty-five billion, one hundred sixty-eight million, two hundred ninety-two thousand, seven hundred seventy-two".