261436023 has 6 divisors (see below), whose sum is σ = 377629824. Its totient is φ = 174290676.

The previous prime is 261436003. The next prime is 261436027. The reversal of 261436023 is 320634162.

It is not a de Polignac number, because 261436023 - 2⁸ = 261435767 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261436027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14524215 + ... + 14524232.

It is an arithmetic number, because the mean of its divisors is an integer number (62938304).

Almost surely, 2^261436023 is an apocalyptic number.

261436023 is a deficient number, since it is larger than the sum of its proper divisors (116193801).

261436023 is a wasteful number, since it uses less digits than its factorization.

261436023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29048453 (or 29048450 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 261436023 is about 16168.9833632174. The cubic root of 261436023 is about 639.4233273871.

The spelling of 261436023 in words is "two hundred sixty-one million, four hundred thirty-six thousand, twenty-three".