261478413 has 48 divisors (see below), whose sum is σ = 449729280. Its totient is φ = 143232768.

The previous prime is 261478403. The next prime is 261478433. The reversal of 261478413 is 314874162.

It is not a de Polignac number, because 261478413 - 2⁵ = 261478381 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261478403) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 304681 + ... + 305537.

It is an arithmetic number, because the mean of its divisors is an integer number (9369360).

Almost surely, 2^261478413 is an apocalyptic number.

It is an amenable number.

261478413 is a deficient number, since it is larger than the sum of its proper divisors (188250867).

261478413 is a wasteful number, since it uses less digits than its factorization.

261478413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1066 (or 1063 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 261478413 is about 16170.2941531686. The cubic root of 261478413 is about 639.4578848411.

The spelling of 261478413 in words is "two hundred sixty-one million, four hundred seventy-eight thousand, four hundred thirteen".