25542270444 has 12 divisors (see below), whose sum is σ = 59598631064. Its totient is φ = 8514090144.

The previous prime is 25542270407. The next prime is 25542270493. The reversal of 25542270444 is 44407224552.

It is a tau number, because it is divible by the number of its divisors (12).

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 3 ways as a sum of consecutive naturals, for example, 1064261257 + ... + 1064261280.

Almost surely, 2^25542270444 is an apocalyptic number.

It is an amenable number.

25542270444 is an abundant number, since it is smaller than the sum of its proper divisors (34056360620).

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

25542270444 is a wasteful number, since it uses less digits than its factorization.

25542270444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2128522544 (or 2128522542 counting only the distinct ones).

The product of its (nonzero) digits is 358400, while the sum is 39.

Adding to 25542270444 its reverse (44407224552), we get a palindrome (69949494996).

The spelling of 25542270444 in words is "twenty-five billion, five hundred forty-two million, two hundred seventy thousand, four hundred forty-four".