261647577350227 has 4 divisors (see below), whose sum is σ = 263214329310576. Its totient is φ = 260080825389880.

The previous prime is 261647577350197. The next prime is 261647577350233. The reversal of 261647577350227 is 722053775746162.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 261647577350227 - 2²⁷ = 261647443132499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261647577350267) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 783375979924 + ... + 783375980257.

It is an arithmetic number, because the mean of its divisors is an integer number (65803582327644).

Almost surely, 2^{261647577350227} is an apocalyptic number.

261647577350227 is a deficient number, since it is larger than the sum of its proper divisors (1566751960349).

261647577350227 is a wasteful number, since it uses less digits than its factorization.

261647577350227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1566751960348.

The product of its (nonzero) digits is 207446400, while the sum is 64.

The spelling of 261647577350227 in words is "two hundred sixty-one trillion, six hundred forty-seven billion, five hundred seventy-seven million, three hundred fifty thousand, two hundred twenty-seven".