25546263161 has 4 divisors (see below), whose sum is σ = 25785013392. Its totient is φ = 25307512932.

The previous prime is 25546263131. The next prime is 25546263181. The reversal of 25546263161 is 16136264552.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25546263161 - 2¹⁸ = 25546001017 is a prime.

It is a super-2 number, since 2×25546263161² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25546263121) 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 3 ways as a sum of consecutive naturals, for example, 119374955 + ... + 119375168.

It is an arithmetic number, because the mean of its divisors is an integer number (6446253348).

Almost surely, 2^25546263161 is an apocalyptic number.

It is an amenable number.

25546263161 is a deficient number, since it is larger than the sum of its proper divisors (238750231).

25546263161 is a wasteful number, since it uses less digits than its factorization.

25546263161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238750230.

The product of its digits is 259200, while the sum is 41.

The spelling of 25546263161 in words is "twenty-five billion, five hundred forty-six million, two hundred sixty-three thousand, one hundred sixty-one".