25409497352 has 8 divisors (see below), whose sum is σ = 47642807550. Its totient is φ = 12704748672.

The previous prime is 25409497339. The next prime is 25409497361. The reversal of 25409497352 is 25379490452.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 19978691716 + 5430805636 = 141346^2 + 73694^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 25409497352.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1588093577 + ... + 1588093592.

Almost surely, 2^25409497352 is an apocalyptic number.

It is an amenable number.

25409497352 is a deficient number, since it is larger than the sum of its proper divisors (22233310198).

25409497352 is a wasteful number, since it uses less digits than its factorization.

25409497352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3176187175 (or 3176187171 counting only the distinct ones).

The product of its (nonzero) digits is 2721600, while the sum is 50.

The spelling of 25409497352 in words is "twenty-five billion, four hundred nine million, four hundred ninety-seven thousand, three hundred fifty-two".