25440404452 has 6 divisors (see below), whose sum is σ = 44520707798. Its totient is φ = 12720202224.

The previous prime is 25440404393. The next prime is 25440404503.

25440404452 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in only one way, i.e., 22845113316 + 2595291136 = 151146^2 + 50944^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3180050553 + ... + 3180050560.

Almost surely, 2^25440404452 is an apocalyptic number.

It is an amenable number.

25440404452 is a deficient number, since it is larger than the sum of its proper divisors (19080303346).

25440404452 is a wasteful number, since it uses less digits than its factorization.

25440404452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6360101117 (or 6360101115 counting only the distinct ones).

The product of its (nonzero) digits is 102400, while the sum is 34.

The spelling of 25440404452 in words is "twenty-five billion, four hundred forty million, four hundred four thousand, four hundred fifty-two".