25543451422 has 32 divisors (see below), whose sum is σ = 41915757312. Its totient is φ = 11626844544.

The previous prime is 25543451407. The next prime is 25543451431. The reversal of 25543451422 is 22415434552.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65773 + ... + 235399.

It is an arithmetic number, because the mean of its divisors is an integer number (1309867416).

Almost surely, 2^25543451422 is an apocalyptic number.

25543451422 is a deficient number, since it is larger than the sum of its proper divisors (16372305890).

25543451422 is a wasteful number, since it uses less digits than its factorization.

25543451422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169792.

The product of its digits is 192000, while the sum is 37.

Adding to 25543451422 its reverse (22415434552), we get a palindrome (47958885974).

The spelling of 25543451422 in words is "twenty-five billion, five hundred forty-three million, four hundred fifty-one thousand, four hundred twenty-two".