261433545 has 8 divisors (see below), whose sum is σ = 418293696. Its totient is φ = 139431216.

The previous prime is 261433537. The next prime is 261433547. The reversal of 261433545 is 545334162.

261433545 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 261433545 - 2³ = 261433537 is a prime.

It is not an unprimeable number, because it can be changed into a prime (261433547) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8714437 + ... + 8714466.

It is an arithmetic number, because the mean of its divisors is an integer number (52286712).

Almost surely, 2^261433545 is an apocalyptic number.

It is an amenable number.

261433545 is a deficient number, since it is larger than the sum of its proper divisors (156860151).

261433545 is a wasteful number, since it uses less digits than its factorization.

261433545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17428911.

The product of its digits is 43200, while the sum is 33.

The square root of 261433545 is about 16168.9067348414. The cubic root of 261433545 is about 639.4213071401.

The spelling of 261433545 in words is "two hundred sixty-one million, four hundred thirty-three thousand, five hundred forty-five".