261016790 has 32 divisors (see below), whose sum is σ = 478932480. Its totient is φ = 102402144.

The previous prime is 261016771. The next prime is 261016883. The reversal of 261016790 is 97610162.

It is a happy number.

It is a Curzon number.

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 in 15 ways as a sum of consecutive naturals, for example, 127757 + ... + 129783.

It is an arithmetic number, because the mean of its divisors is an integer number (14966640).

Almost surely, 2^261016790 is an apocalyptic number.

261016790 is a deficient number, since it is larger than the sum of its proper divisors (217915690).

261016790 is a wasteful number, since it uses less digits than its factorization.

261016790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2276.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 261016790 is about 16156.0140505014. The cubic root of 261016790 is about 639.0813561807.

The spelling of 261016790 in words is "two hundred sixty-one million, sixteen thousand, seven hundred ninety".