261864262 has 8 divisors (see below), whose sum is σ = 428505192. Its totient is φ = 119029200.

The previous prime is 261864257. The next prime is 261864271. The reversal of 261864262 is 262468162.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

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, 5951439 + ... + 5951482.

It is an arithmetic number, because the mean of its divisors is an integer number (53563149).

Almost surely, 2^261864262 is an apocalyptic number.

261864262 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

261864262 is a deficient number, since it is larger than the sum of its proper divisors (166640930).

261864262 is a wasteful number, since it uses less digits than its factorization.

261864262 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11902934.

The product of its digits is 55296, while the sum is 37.

The square root of 261864262 is about 16182.2205521986. The cubic root of 261864262 is about 639.7722676080.

The spelling of 261864262 in words is "two hundred sixty-one million, eight hundred sixty-four thousand, two hundred sixty-two".