775041561 has 16 divisors (see below), whose sum is σ = 1312240000. Its totient is φ = 442880784.

The previous prime is 775041551. The next prime is 775041593. The reversal of 775041561 is 165140577.

775041561 is a `hidden beast` number, since 7 + 7 + 50 + 41 + 561 = 666.

It is not a de Polignac number, because 775041561 - 2⁶ = 775041497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (775041541) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 2050186 + ... + 2050563.

It is an arithmetic number, because the mean of its divisors is an integer number (82015000).

Almost surely, 2^775041561 is an apocalyptic number.

It is an amenable number.

775041561 is a deficient number, since it is larger than the sum of its proper divisors (537198439).

775041561 is a wasteful number, since it uses less digits than its factorization.

775041561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4100765 (or 4100759 counting only the distinct ones).

The product of its (nonzero) digits is 29400, while the sum is 36.

The square root of 775041561 is about 27839.5682617385. The cubic root of 775041561 is about 918.5616943524.

The spelling of 775041561 in words is "seven hundred seventy-five million, forty-one thousand, five hundred sixty-one".