261436612 has 12 divisors (see below), whose sum is σ = 461117440. Its totient is φ = 129688776.

The previous prime is 261436601. The next prime is 261436633. The reversal of 261436612 is 216634162.

261436612 is digitally balanced in base 2, 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 3 ways as a sum of consecutive naturals, for example, 256812 + ... + 257827.

Almost surely, 2^261436612 is an apocalyptic number.

It is an amenable number.

261436612 is a deficient number, since it is larger than the sum of its proper divisors (199680828).

261436612 is a wasteful number, since it uses less digits than its factorization.

261436612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 514770 (or 514768 counting only the distinct ones).

The product of its digits is 10368, while the sum is 31.

The square root of 261436612 is about 16169.0015770919. The cubic root of 261436612 is about 639.4238075811.

The spelling of 261436612 in words is "two hundred sixty-one million, four hundred thirty-six thousand, six hundred twelve".