261610072 has 8 divisors (see below), whose sum is σ = 490518900. Its totient is φ = 130805032.

The previous prime is 261610061. The next prime is 261610087. The reversal of 261610072 is 270016162.

261610072 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16350622 + ... + 16350637.

Almost surely, 2^261610072 is an apocalyptic number.

It is an amenable number.

261610072 is a deficient number, since it is larger than the sum of its proper divisors (228908828).

261610072 is a wasteful number, since it uses less digits than its factorization.

261610072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32701265 (or 32701261 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 261610072 is about 16174.3646552191. The cubic root of 261610072 is about 639.5651929463.

The spelling of 261610072 in words is "two hundred sixty-one million, six hundred ten thousand, seventy-two".