775649540 has 24 divisors (see below), whose sum is σ = 1714594560. Its totient is φ = 293930208.

The previous prime is 775649519. The next prime is 775649549. The reversal of 775649540 is 45946577.

775649540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (775649549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1020212 + ... + 1020971.

It is an arithmetic number, because the mean of its divisors is an integer number (71441440).

Almost surely, 2^775649540 is an apocalyptic number.

It is an amenable number.

775649540 is an abundant number, since it is smaller than the sum of its proper divisors (938945020).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

775649540 is a wasteful number, since it uses less digits than its factorization.

775649540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2041211 (or 2041209 counting only the distinct ones).

The product of its (nonzero) digits is 1058400, while the sum is 47.

The square root of 775649540 is about 27850.4854535787. The cubic root of 775649540 is about 918.8018192193.

The spelling of 775649540 in words is "seven hundred seventy-five million, six hundred forty-nine thousand, five hundred forty".