775802081 has 4 divisors (see below), whose sum is σ = 779864064. Its totient is φ = 771740100.

The previous prime is 775802047. The next prime is 775802107. The reversal of 775802081 is 180208577.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 180208577 = 13003 ⋅13859.

It is a cyclic number.

It is not a de Polignac number, because 775802081 - 2⁶ = 775802017 is a prime.

It is a super-2 number, since 2×775802081² = 1203737737767861122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (775802981) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2030705 + ... + 2031086.

It is an arithmetic number, because the mean of its divisors is an integer number (194966016).

Almost surely, 2^775802081 is an apocalyptic number.

It is an amenable number.

775802081 is a deficient number, since it is larger than the sum of its proper divisors (4061983).

775802081 is a wasteful number, since it uses less digits than its factorization.

775802081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4061982.

The product of its (nonzero) digits is 31360, while the sum is 38.

The square root of 775802081 is about 27853.2238888068. The cubic root of 775802081 is about 918.8620464887.

The spelling of 775802081 in words is "seven hundred seventy-five million, eight hundred two thousand, eighty-one".