261868468 has 6 divisors (see below), whose sum is σ = 458269826. Its totient is φ = 130934232.

The previous prime is 261868433. The next prime is 261868549. The reversal of 261868468 is 864868162.

It can be written as a sum of positive squares in only one way, i.e., 228251664 + 33616804 = 15108^2 + 5798^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32733555 + ... + 32733562.

Almost surely, 2^261868468 is an apocalyptic number.

It is an amenable number.

261868468 is a deficient number, since it is larger than the sum of its proper divisors (196401358).

261868468 is a wasteful number, since it uses less digits than its factorization.

261868468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65467121 (or 65467119 counting only the distinct ones).

The product of its digits is 884736, while the sum is 49.

The square root of 261868468 is about 16182.3505091195. The cubic root of 261868468 is about 639.7756928784.

The spelling of 261868468 in words is "two hundred sixty-one million, eight hundred sixty-eight thousand, four hundred sixty-eight".