25161768 has 96 divisors (see below), whose sum is σ = 73555560. Its totient is φ = 7741440.

The previous prime is 25161743. The next prime is 25161781. The reversal of 25161768 is 86716152.

It can be written as a sum of positive squares in 4 ways, for example, as 15539364 + 9622404 = 3942^2 + 3102^2 .

It is a super-2 number, since 2×25161768² = 1266229137771648, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

Its product of digits (20160) is a multiple of the sum of its prime divisors (420).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 74496 + ... + 74832.

Almost surely, 2^25161768 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 25161768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36777780).

25161768 is an abundant number, since it is smaller than the sum of its proper divisors (48393792).

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

25161768 is a wasteful number, since it uses less digits than its factorization.

25161768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427 (or 420 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 25161768 is about 5016.1507154391. The cubic root of 25161768 is about 293.0311017007.

The spelling of 25161768 in words is "twenty-five million, one hundred sixty-one thousand, seven hundred sixty-eight".