25546551325551 has 16 divisors (see below), whose sum is σ = 38869627644000. Its totient is φ = 16570735994304.

The previous prime is 25546551325507. The next prime is 25546551325597. The reversal of 25546551325551 is 15552315564552.

25546551325551 is a `hidden beast` number, since 2 + 5 + 5 + 4 + 6 + 5 + 51 + 32 + 5 + 551 = 666.

It is not a de Polignac number, because 25546551325551 - 2¹⁰ = 25546551324527 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25546551323551) 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, 12786060726 + ... + 12786062723.

It is an arithmetic number, because the mean of its divisors is an integer number (2429351727750).

Almost surely, 2^{25546551325551} is an apocalyptic number.

25546551325551 is a deficient number, since it is larger than the sum of its proper divisors (13323076318449).

25546551325551 is a wasteful number, since it uses less digits than its factorization.

25546551325551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25572123495 (or 25572123489 counting only the distinct ones).

The product of its digits is 22500000, while the sum is 54.

The spelling of 25546551325551 in words is "twenty-five trillion, five hundred forty-six billion, five hundred fifty-one million, three hundred twenty-five thousand, five hundred fifty-one".