261049672 has 32 divisors (see below), whose sum is σ = 527788800. Its totient is φ = 120331584.

The previous prime is 261049661. The next prime is 261049673. The reversal of 261049672 is 276940162.

It is not an unprimeable number, because it can be changed into a prime (261049673) 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, 147529 + ... + 149287.

It is an arithmetic number, because the mean of its divisors is an integer number (16493400).

Almost surely, 2^261049672 is an apocalyptic number.

It is an amenable number.

261049672 is an abundant number, since it is smaller than the sum of its proper divisors (266739128).

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

261049672 is a wasteful number, since it uses less digits than its factorization.

261049672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3205 (or 3201 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 261049672 is about 16157.0316580738. The cubic root of 261049672 is about 639.1081914797.

The spelling of 261049672 in words is "two hundred sixty-one million, forty-nine thousand, six hundred seventy-two".