261883954 has 16 divisors (see below), whose sum is σ = 414269280. Its totient is φ = 123819840.

The previous prime is 261883931. The next prime is 261883967. The reversal of 261883954 is 459388162.

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, 15274 + ... + 27514.

It is an arithmetic number, because the mean of its divisors is an integer number (25891830).

Almost surely, 2^261883954 is an apocalyptic number.

261883954 is a deficient number, since it is larger than the sum of its proper divisors (152385326).

261883954 is a wasteful number, since it uses less digits than its factorization.

261883954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12825.

The product of its digits is 414720, while the sum is 46.

The square root of 261883954 is about 16182.8289863052. The cubic root of 261883954 is about 639.7883040074.

The spelling of 261883954 in words is "two hundred sixty-one million, eight hundred eighty-three thousand, nine hundred fifty-four".