261606294 has 16 divisors (see below), whose sum is σ = 581347440. Its totient is φ = 87202080.

The previous prime is 261606287. The next prime is 261606299. The reversal of 261606294 is 492606162.

261606294 is a `hidden beast` number, since 26 + 1 + 6 + 0 + 629 + 4 = 666.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261606299) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2422227 + ... + 2422334.

It is an arithmetic number, because the mean of its divisors is an integer number (36334215).

Almost surely, 2^261606294 is an apocalyptic number.

261606294 is an abundant number, since it is smaller than the sum of its proper divisors (319741146).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

261606294 is a wasteful number, since it uses less digits than its factorization.

261606294 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4844572 (or 4844566 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 261606294 is about 16174.2478650477. The cubic root of 261606294 is about 639.5621142054.

The spelling of 261606294 in words is "two hundred sixty-one million, six hundred six thousand, two hundred ninety-four".