25516764 has 72 divisors (see below), whose sum is σ = 79395680. Its totient is φ = 6728832.

The previous prime is 25516747. The next prime is 25516787. The reversal of 25516764 is 46761552.

It is a happy number.

It is a super-2 number, since 2×25516764² = 1302210490063392, which contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 619 + ... + 7170.

Almost surely, 2^25516764 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 25516764, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39697840).

25516764 is an abundant number, since it is smaller than the sum of its proper divisors (53878916).

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

25516764 is a wasteful number, since it uses less digits than its factorization.

25516764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7819 (or 7814 counting only the distinct ones).

The product of its digits is 50400, while the sum is 36.

The square root of 25516764 is about 5051.4120798050. The cubic root of 25516764 is about 294.4027521945.

The spelling of 25516764 in words is "twenty-five million, five hundred sixteen thousand, seven hundred sixty-four".