261478113 has 8 divisors (see below), whose sum is σ = 375455808. Its totient is φ = 160909584.

The previous prime is 261478109. The next prime is 261478127. The reversal of 261478113 is 311874162.

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

It is not a de Polignac number, because 261478113 - 2² = 261478109 is a prime.

It is not an unprimeable number, because it can be changed into a prime (261478103) 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 7 ways as a sum of consecutive naturals, for example, 3352245 + ... + 3352322.

It is an arithmetic number, because the mean of its divisors is an integer number (46931976).

Almost surely, 2^261478113 is an apocalyptic number.

It is an amenable number.

261478113 is a deficient number, since it is larger than the sum of its proper divisors (113977695).

261478113 is a wasteful number, since it uses less digits than its factorization.

261478113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6704583.

The product of its digits is 8064, while the sum is 33.

The square root of 261478113 is about 16170.2848768969. The cubic root of 261478113 is about 639.4576402862.

The spelling of 261478113 in words is "two hundred sixty-one million, four hundred seventy-eight thousand, one hundred thirteen".