25045781504 has 44 divisors (see below), whose sum is σ = 50100144864. Its totient is φ = 12514627584.

The previous prime is 25045781503. The next prime is 25045781507. The reversal of 25045781504 is 40518754052.

It is a super-2 number, since 2×25045781504² (a number of 22 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (25045781503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1726409 + ... + 1740855.

It is an arithmetic number, because the mean of its divisors is an integer number (1138639656).

Almost surely, 2^25045781504 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 25045781504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25050072432).

25045781504 is an abundant number, since it is smaller than the sum of its proper divisors (25054363360).

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

25045781504 is a wasteful number, since it uses less digits than its factorization.

25045781504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16160 (or 16142 counting only the distinct ones).

The product of its (nonzero) digits is 224000, while the sum is 41.

The spelling of 25045781504 in words is "twenty-five billion, forty-five million, seven hundred eighty-one thousand, five hundred four".