261677626 has 16 divisors (see below), whose sum is σ = 456194880. Its totient is φ = 110246400.

The previous prime is 261677587. The next prime is 261677659. The reversal of 261677626 is 626776162.

261677626 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 157575 + ... + 159226.

It is an arithmetic number, because the mean of its divisors is an integer number (28512180).

Almost surely, 2^261677626 is an apocalyptic number.

261677626 is a deficient number, since it is larger than the sum of its proper divisors (194517254).

261677626 is a wasteful number, since it uses less digits than its factorization.

261677626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316869.

The product of its digits is 254016, while the sum is 43.

The square root of 261677626 is about 16176.4528250170. The cubic root of 261677626 is about 639.6202385700.

The spelling of 261677626 in words is "two hundred sixty-one million, six hundred seventy-seven thousand, six hundred twenty-six".