261345356 has 24 divisors (see below), whose sum is σ = 471611616. Its totient is φ = 126627840.

The previous prime is 261345349. The next prime is 261345367. The reversal of 261345356 is 653543162.

261345356 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 7 ways as a sum of consecutive naturals, for example, 34601 + ... + 41471.

It is an arithmetic number, because the mean of its divisors is an integer number (19650484).

Almost surely, 2^261345356 is an apocalyptic number.

It is an amenable number.

261345356 is a deficient number, since it is larger than the sum of its proper divisors (210266260).

261345356 is a wasteful number, since it uses less digits than its factorization.

261345356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7169 (or 7167 counting only the distinct ones).

The product of its digits is 64800, while the sum is 35.

The square root of 261345356 is about 16166.1793878455. The cubic root of 261345356 is about 639.3494006989.

The spelling of 261345356 in words is "two hundred sixty-one million, three hundred forty-five thousand, three hundred fifty-six".