773661028331 has 4 divisors (see below), whose sum is σ = 773664333672. Its totient is φ = 773657722992.

The previous prime is 773661028307. The next prime is 773661028333. The reversal of 773661028331 is 133820166377.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-773661028331 is a prime.

It is a super-2 number, since 2×773661028331² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (773661028333) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1272410 + ... + 1779423.

It is an arithmetic number, because the mean of its divisors is an integer number (193416083418).

Almost surely, 2^773661028331 is an apocalyptic number.

773661028331 is a deficient number, since it is larger than the sum of its proper divisors (3305341).

773661028331 is a wasteful number, since it uses less digits than its factorization.

773661028331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3305340.

The product of its (nonzero) digits is 762048, while the sum is 47.

The spelling of 773661028331 in words is "seven hundred seventy-three billion, six hundred sixty-one million, twenty-eight thousand, three hundred thirty-one".