25162665440 has 96 divisors (see below), whose sum is σ = 64889929440. Its totient is φ = 9144576000.

The previous prime is 25162665419. The next prime is 25162665491. The reversal of 25162665440 is 4456626152.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3990290 + ... + 3996590.

It is an arithmetic number, because the mean of its divisors is an integer number (675936765).

Almost surely, 2^25162665440 is an apocalyptic number.

25162665440 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 25162665440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32444964720).

25162665440 is an abundant number, since it is smaller than the sum of its proper divisors (39727264000).

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

25162665440 is a wasteful number, since it uses less digits than its factorization.

25162665440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8596 (or 8588 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 41.

The spelling of 25162665440 in words is "twenty-five billion, one hundred sixty-two million, six hundred sixty-five thousand, four hundred forty".