261413882 has 4 divisors (see below), whose sum is σ = 392120826. Its totient is φ = 130706940.

The previous prime is 261413863. The next prime is 261413891. The reversal of 261413882 is 288314162.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 179854921 + 81558961 = 13411^2 + 9031^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65353469 + ... + 65353472.

Almost surely, 2^261413882 is an apocalyptic number.

261413882 is a deficient number, since it is larger than the sum of its proper divisors (130706944).

261413882 is a wasteful number, since it uses less digits than its factorization.

261413882 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130706943.

The product of its digits is 18432, while the sum is 35.

The square root of 261413882 is about 16168.2986736391. The cubic root of 261413882 is about 639.4052759707.

The spelling of 261413882 in words is "two hundred sixty-one million, four hundred thirteen thousand, eight hundred eighty-two".