25734521852 has 12 divisors (see below), whose sum is σ = 48499675896. Its totient is φ = 11877471600.

The previous prime is 25734521849. The next prime is 25734521867. The reversal of 25734521852 is 25812543752.

It is a happy number.

It is a super-2 number, since 2×25734521852² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 247447274 + ... + 247447377.

It is an arithmetic number, because the mean of its divisors is an integer number (4041639658).

Almost surely, 2^25734521852 is an apocalyptic number.

It is an amenable number.

25734521852 is a deficient number, since it is larger than the sum of its proper divisors (22765154044).

25734521852 is a wasteful number, since it uses less digits than its factorization.

25734521852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 494894668 (or 494894666 counting only the distinct ones).

The product of its digits is 672000, while the sum is 44.

The spelling of 25734521852 in words is "twenty-five billion, seven hundred thirty-four million, five hundred twenty-one thousand, eight hundred fifty-two".