261646127444741 has 16 divisors (see below), whose sum is σ = 288485543582208. Its totient is φ = 235791310944000.

The previous prime is 261646127444731. The next prime is 261646127444753. The reversal of 261646127444741 is 147444721646162.

It is a cyclic number.

It is not a de Polignac number, because 261646127444741 - 2¹⁰ = 261646127443717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261646127444731) 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, 533702705 + ... + 534192726.

It is an arithmetic number, because the mean of its divisors is an integer number (18030346473888).

Almost surely, 2^{261646127444741} is an apocalyptic number.

It is an amenable number.

261646127444741 is a deficient number, since it is larger than the sum of its proper divisors (26839416137467).

261646127444741 is a wasteful number, since it uses less digits than its factorization.

261646127444741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1067895892.

The product of its digits is 43352064, while the sum is 59.

The spelling of 261646127444741 in words is "two hundred sixty-one trillion, six hundred forty-six billion, one hundred twenty-seven million, four hundred forty-four thousand, seven hundred forty-one".