261179545 has 8 divisors (see below), whose sum is σ = 341907840. Its totient is φ = 189948720.

The previous prime is 261179533. The next prime is 261179599. The reversal of 261179545 is 545971162.

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

It is not a de Polignac number, because 261179545 - 2²⁵ = 227625113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 261179498 and 261179507.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2374305 + ... + 2374414.

It is an arithmetic number, because the mean of its divisors is an integer number (42738480).

Almost surely, 2^261179545 is an apocalyptic number.

It is an amenable number.

261179545 is a deficient number, since it is larger than the sum of its proper divisors (80728295).

261179545 is a wasteful number, since it uses less digits than its factorization.

261179545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4748735.

The product of its digits is 75600, while the sum is 40.

The square root of 261179545 is about 16161.0502443375. The cubic root of 261179545 is about 639.2141599933.

The spelling of 261179545 in words is "two hundred sixty-one million, one hundred seventy-nine thousand, five hundred forty-five".