25054820261 has 8 divisors (see below), whose sum is σ = 25158335424. Its totient is φ = 24951352320.

The previous prime is 25054820243. The next prime is 25054820291. The reversal of 25054820261 is 16202845052.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25054820261 is a prime.

It is a super-2 number, since 2×25054820261² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25054820291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1389896 + ... + 1407806.

It is an arithmetic number, because the mean of its divisors is an integer number (3144791928).

Almost surely, 2^25054820261 is an apocalyptic number.

It is an amenable number.

25054820261 is a deficient number, since it is larger than the sum of its proper divisors (103515163).

25054820261 is a wasteful number, since it uses less digits than its factorization.

25054820261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23611.

The product of its (nonzero) digits is 38400, while the sum is 35.

The spelling of 25054820261 in words is "twenty-five billion, fifty-four million, eight hundred twenty thousand, two hundred sixty-one".