261444306412 has 24 divisors (see below), whose sum is σ = 459497333456. Its totient is φ = 130160279808.

The previous prime is 261444306401. The next prime is 261444306413. The reversal of 261444306412 is 214603444162.

It is not an unprimeable number, because it can be changed into a prime (261444306413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1020448 + ... + 1250680.

Almost surely, 2^261444306412 is an apocalyptic number.

It is an amenable number.

261444306412 is a deficient number, since it is larger than the sum of its proper divisors (198053027044).

261444306412 is a wasteful number, since it uses less digits than its factorization.

261444306412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231457 (or 231455 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 37.

The spelling of 261444306412 in words is "two hundred sixty-one billion, four hundred forty-four million, three hundred six thousand, four hundred twelve".