25455644655451 has 16 divisors (see below), whose sum is σ = 25846442093440. Its totient is φ = 25066613445120.

The previous prime is 25455644655437. The next prime is 25455644655457. The reversal of 25455644655451 is 15455644655452.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 25455644655451 - 2²¹ = 25455642558299 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25455644655451.

It is not an unprimeable number, because it can be changed into a prime (25455644655457) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76987141 + ... + 77317081.

It is an arithmetic number, because the mean of its divisors is an integer number (1615402630840).

Almost surely, 2^{25455644655451} is an apocalyptic number.

25455644655451 is a deficient number, since it is larger than the sum of its proper divisors (390797437989).

25455644655451 is a wasteful number, since it uses less digits than its factorization.

25455644655451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332614.

The product of its digits is 288000000, while the sum is 61.

Subtracting from 25455644655451 its reverse (15455644655452), we obtain a palindrome (9999999999999).

The spelling of 25455644655451 in words is "twenty-five trillion, four hundred fifty-five billion, six hundred forty-four million, six hundred fifty-five thousand, four hundred fifty-one".