773864689761 has 6 divisors (see below), whose sum is σ = 1117804551890. Its totient is φ = 515909793168.

The previous prime is 773864689723. The next prime is 773864689769. The reversal of 773864689761 is 167986468377.

It is a happy number.

773864689761 is a `hidden beast` number, since 7 + 73 + 8 + 6 + 468 + 97 + 6 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 590967337536 + 182897352225 = 768744^2 + 427665^2 .

It is a de Polignac number, because none of the positive numbers 2^k-773864689761 is a prime.

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 773864689761.

It is not an unprimeable number, because it can be changed into a prime (773864689769) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 42992482756 + ... + 42992482773.

Almost surely, 2^773864689761 is an apocalyptic number.

It is an amenable number.

773864689761 is a deficient number, since it is larger than the sum of its proper divisors (343939862129).

773864689761 is a wasteful number, since it uses less digits than its factorization.

773864689761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85984965535 (or 85984965532 counting only the distinct ones).

The product of its digits is 512096256, while the sum is 72.

The spelling of 773864689761 in words is "seven hundred seventy-three billion, eight hundred sixty-four million, six hundred eighty-nine thousand, seven hundred sixty-one".