261783468 has 48 divisors (see below), whose sum is σ = 700600320. Its totient is φ = 84445200.

The previous prime is 261783451. The next prime is 261783479. The reversal of 261783468 is 864387162.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35748 + ... + 42443.

It is an arithmetic number, because the mean of its divisors is an integer number (14595840).

Almost surely, 2^261783468 is an apocalyptic number.

It is an amenable number.

261783468 is an abundant number, since it is smaller than the sum of its proper divisors (438816852).

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

261783468 is a wasteful number, since it uses less digits than its factorization.

261783468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78235 (or 78227 counting only the distinct ones).

The product of its digits is 387072, while the sum is 45.

The square root of 261783468 is about 16179.7239778681. The cubic root of 261783468 is about 639.7064636973.

It can be divided in two parts, 26178 and 3468, that added together give a triangular number (29646 = T₂₄₃).

The spelling of 261783468 in words is "two hundred sixty-one million, seven hundred eighty-three thousand, four hundred sixty-eight".