25541404651 has 16 divisors (see below), whose sum is σ = 29286995200. Its totient is φ = 21820101408.

The previous prime is 25541404643. The next prime is 25541404687. The reversal of 25541404651 is 15640414552.

It is not a de Polignac number, because 25541404651 - 2³ = 25541404643 is a prime.

It is a super-2 number, since 2×25541404651² (a number of 22 digits) contains 22 as substring.

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 25541404651.

It is not an unprimeable number, because it can be changed into a prime (25541404631) 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, 6017536 + ... + 6021778.

It is an arithmetic number, because the mean of its divisors is an integer number (1830437200).

Almost surely, 2^25541404651 is an apocalyptic number.

25541404651 is a deficient number, since it is larger than the sum of its proper divisors (3745590549).

25541404651 is a wasteful number, since it uses less digits than its factorization.

25541404651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6898.

The product of its (nonzero) digits is 96000, while the sum is 37.

Subtracting from 25541404651 its reverse (15640414552), we obtain a palindrome (9900990099).

The spelling of 25541404651 in words is "twenty-five billion, five hundred forty-one million, four hundred four thousand, six hundred fifty-one".