765477649 has 8 divisors (see below), whose sum is σ = 838454760. Its totient is φ = 695606016.

The previous prime is 765477619. The next prime is 765477653. The reversal of 765477649 is 946774567.

It can be written as a sum of positive squares in 4 ways, for example, as 342435025 + 423042624 = 18505^2 + 20568^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 765477649 - 2⁵ = 765477617 is a prime.

It is a super-2 number, since 2×765477649² = 1171912062237134402, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 765477649.

It is not an unprimeable number, because it can be changed into a prime (765477619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 775854 + ... + 776839.

It is an arithmetic number, because the mean of its divisors is an integer number (104806845).

Almost surely, 2^765477649 is an apocalyptic number.

It is an amenable number.

765477649 is a deficient number, since it is larger than the sum of its proper divisors (72977111).

765477649 is a wasteful number, since it uses less digits than its factorization.

765477649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1552739.

The product of its digits is 8890560, while the sum is 55.

The square root of 765477649 is about 27667.2667424883. The cubic root of 765477649 is about 914.7677350485.

The spelling of 765477649 in words is "seven hundred sixty-five million, four hundred seventy-seven thousand, six hundred forty-nine".