25507044216 has 24 divisors (see below), whose sum is σ = 69081578280. Its totient is φ = 8502348048.

The previous prime is 25507044193. The next prime is 25507044223. The reversal of 25507044216 is 61244070552.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (24).

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 (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 177132180 + ... + 177132323.

It is an arithmetic number, because the mean of its divisors is an integer number (2878399095).

Almost surely, 2^25507044216 is an apocalyptic number.

It is an amenable number.

25507044216 is an abundant number, since it is smaller than the sum of its proper divisors (43574534064).

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

25507044216 is a wasteful number, since it uses less digits than its factorization.

25507044216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354264515 (or 354264508 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 36.

The spelling of 25507044216 in words is "twenty-five billion, five hundred seven million, forty-four thousand, two hundred sixteen".