261036077 has 4 divisors (see below), whose sum is σ = 265961340. Its totient is φ = 256110816.

The previous prime is 261036043. The next prime is 261036091. The reversal of 261036077 is 770630162.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 166771396 + 94264681 = 12914^2 + 9709^2 .

It is a cyclic number.

It is not a de Polignac number, because 261036077 - 2⁸ = 261035821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261035077) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2462552 + ... + 2462657.

It is an arithmetic number, because the mean of its divisors is an integer number (66490335).

Almost surely, 2^261036077 is an apocalyptic number.

It is an amenable number.

261036077 is a deficient number, since it is larger than the sum of its proper divisors (4925263).

261036077 is an equidigital number, since it uses as much as digits as its factorization.

261036077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4925262.

The product of its (nonzero) digits is 10584, while the sum is 32.

The square root of 261036077 is about 16156.6109379412. The cubic root of 261036077 is about 639.0970967499.

The spelling of 261036077 in words is "two hundred sixty-one million, thirty-six thousand, seventy-seven".