25021330616 has 32 divisors (see below), whose sum is σ = 49147128000. Its totient is φ = 11926352256.

The previous prime is 25021330589. The next prime is 25021330619. The reversal of 25021330616 is 61603312052.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25021330619) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 664271 + ... + 700926.

It is an arithmetic number, because the mean of its divisors is an integer number (1535847750).

Almost surely, 2^25021330616 is an apocalyptic number.

It is an amenable number.

25021330616 is a deficient number, since it is larger than the sum of its proper divisors (24125797384).

25021330616 is a wasteful number, since it uses less digits than its factorization.

25021330616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1365311 (or 1365307 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 29.

Adding to 25021330616 its reverse (61603312052), we get a palindrome (86624642668).

The spelling of 25021330616 in words is "twenty-five billion, twenty-one million, three hundred thirty thousand, six hundred sixteen".