261570612 has 24 divisors (see below), whose sum is σ = 626827936. Its totient is φ = 84833568.

The previous prime is 261570601. The next prime is 261570629. The reversal of 261570612 is 216075162.

It is a self number, because there is not a number n which added to its sum of digits gives 261570612.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 294118 + ... + 295005.

Almost surely, 2^261570612 is an apocalyptic number.

It is an amenable number.

261570612 is an abundant number, since it is smaller than the sum of its proper divisors (365257324).

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

261570612 is a wasteful number, since it uses less digits than its factorization.

261570612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 589167 (or 589165 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 261570612 is about 16173.1447776862. The cubic root of 261570612 is about 639.5330350210.

The spelling of 261570612 in words is "two hundred sixty-one million, five hundred seventy thousand, six hundred twelve".