261164470 has 64 divisors (see below), whose sum is σ = 548228736. Its totient is φ = 87736320.

The previous prime is 261164419. The next prime is 261164473. The reversal of 261164470 is 74461162.

261164470 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261164473) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1083550 + ... + 1083790.

It is an arithmetic number, because the mean of its divisors is an integer number (8566074).

Almost surely, 2^261164470 is an apocalyptic number.

261164470 is an abundant number, since it is smaller than the sum of its proper divisors (287064266).

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

261164470 is a wasteful number, since it uses less digits than its factorization.

261164470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 261164470 is about 16160.5838384633. The cubic root of 261164470 is about 639.2018615074.

It can be divided in two parts, 2611 and 64470, that added together give a square (67081 = 259²).

The spelling of 261164470 in words is "two hundred sixty-one million, one hundred sixty-four thousand, four hundred seventy".