765767641 has 2 divisors, whose sum is σ = 765767642. Its totient is φ = 765767640.

The previous prime is 765767633. The next prime is 765767699. The reversal of 765767641 is 146767567.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 609892416 + 155875225 = 24696^2 + 12485^2 .

It is a cyclic number.

It is not a de Polignac number, because 765767641 - 2³ = 765767633 is a prime.

It is not a weakly prime, because it can be changed into another prime (765767141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 382883820 + 382883821.

It is an arithmetic number, because the mean of its divisors is an integer number (382883821).

Almost surely, 2^765767641 is an apocalyptic number.

It is an amenable number.

765767641 is a deficient number, since it is larger than the sum of its proper divisors (1).

765767641 is an equidigital number, since it uses as much as digits as its factorization.

765767641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1481760, while the sum is 49.

The square root of 765767641 is about 27672.5069518466. The cubic root of 765767641 is about 914.8832367154.

The spelling of 765767641 in words is "seven hundred sixty-five million, seven hundred sixty-seven thousand, six hundred forty-one".