25801480549 has 8 divisors (see below), whose sum is σ = 27791866872. Its totient is φ = 23811902400.

The previous prime is 25801480469. The next prime is 25801480561. The reversal of 25801480549 is 94508410852.

It can be written as a sum of positive squares in 4 ways, for example, as 6606763524 + 19194717025 = 81282^2 + 138545^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25801480549 - 2⁹ = 25801480037 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25801480499 and 25801480508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25801480949) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 134902 + ... + 264199.

It is an arithmetic number, because the mean of its divisors is an integer number (3473983359).

Almost surely, 2^25801480549 is an apocalyptic number.

It is an amenable number.

25801480549 is a deficient number, since it is larger than the sum of its proper divisors (1990386323).

25801480549 is a wasteful number, since it uses less digits than its factorization.

25801480549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404087.

The product of its (nonzero) digits is 460800, while the sum is 46.

The spelling of 25801480549 in words is "twenty-five billion, eight hundred one million, four hundred eighty thousand, five hundred forty-nine".