25541633614551 has 16 divisors (see below), whose sum is σ = 35910687795840. Its totient is φ = 16103306636640.

The previous prime is 25541633614543. The next prime is 25541633614559. The reversal of 25541633614551 is 15541633614552.

It is an interprime number because it is at equal distance from previous prime (25541633614543) and next prime (25541633614559).

It is not a de Polignac number, because 25541633614551 - 2³ = 25541633614543 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25541633614494 and 25541633614503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25541633614559) 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, 392348220 + ... + 392413313.

It is an arithmetic number, because the mean of its divisors is an integer number (2244417987240).

Almost surely, 2^{25541633614551} is an apocalyptic number.

25541633614551 is a deficient number, since it is larger than the sum of its proper divisors (10369054181289).

25541633614551 is a wasteful number, since it uses less digits than its factorization.

25541633614551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 784762126.

The product of its digits is 6480000, while the sum is 51.

Subtracting from 25541633614551 its reverse (15541633614552), we obtain a palindrome (9999999999999).

The spelling of 25541633614551 in words is "twenty-five trillion, five hundred forty-one billion, six hundred thirty-three million, six hundred fourteen thousand, five hundred fifty-one".