261136363 has 2 divisors, whose sum is σ = 261136364. Its totient is φ = 261136362.

The previous prime is 261136331. The next prime is 261136427. The reversal of 261136363 is 363631162.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 261136363 - 2⁵ = 261136331 is a prime.

It is equal to p_14254537 and since 261136363 and 14254537 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (261136313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130568181 + 130568182.

It is an arithmetic number, because the mean of its divisors is an integer number (130568182).

Almost surely, 2^261136363 is an apocalyptic number.

261136363 is a deficient number, since it is larger than the sum of its proper divisors (1).

261136363 is an equidigital number, since it uses as much as digits as its factorization.

261136363 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11664, while the sum is 31.

The square root of 261136363 is about 16159.7141992054. The cubic root of 261136363 is about 639.1789299919.

The spelling of 261136363 in words is "two hundred sixty-one million, one hundred thirty-six thousand, three hundred sixty-three".