261432660004427 has 4 divisors (see below), whose sum is σ = 261435597242040. Its totient is φ = 261429722766816.

The previous prime is 261432660004331. The next prime is 261432660004433. The reversal of 261432660004427 is 724400066234162.

261432660004427 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 261432660004427 - 2⁴² = 257034613493323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261432660007427) 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, 1468485293 + ... + 1468663310.

It is an arithmetic number, because the mean of its divisors is an integer number (65358899310510).

Almost surely, 2^{261432660004427} is an apocalyptic number.

261432660004427 is a deficient number, since it is larger than the sum of its proper divisors (2937237613).

261432660004427 is an equidigital number, since it uses as much as digits as its factorization.

261432660004427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2937237612.

The product of its (nonzero) digits is 2322432, while the sum is 47.

The spelling of 261432660004427 in words is "two hundred sixty-one trillion, four hundred thirty-two billion, six hundred sixty million, four thousand, four hundred twenty-seven".