774653081 has 12 divisors (see below), whose sum is σ = 790110972. Its totient is φ = 759435264.

The previous prime is 774653039. The next prime is 774653147. The reversal of 774653081 is 180356477.

It can be written as a sum of positive squares in 6 ways, for example, as 39375625 + 735277456 = 6275^2 + 27116^2 .

It is a de Polignac number, because none of the positive numbers 2^k-774653081 is a prime.

It is a super-2 number, since 2×774653081² = 1200174791805585122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (774650081) 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 11 ways as a sum of consecutive naturals, for example, 1342265 + ... + 1342841.

It is an arithmetic number, because the mean of its divisors is an integer number (65842581).

Almost surely, 2^774653081 is an apocalyptic number.

It is an amenable number.

774653081 is a deficient number, since it is larger than the sum of its proper divisors (15457891).

774653081 is a wasteful number, since it uses less digits than its factorization.

774653081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 908 (or 799 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 41.

The square root of 774653081 is about 27832.5902675263. The cubic root of 774653081 is about 918.4081961390.

The spelling of 774653081 in words is "seven hundred seventy-four million, six hundred fifty-three thousand, eighty-one".