773738381377 has 8 divisors (see below), whose sum is σ = 833266860776. Its totient is φ = 714211350912.

The previous prime is 773738381363. The next prime is 773738381387. The reversal of 773738381377 is 773183837377.

It is a Cunningham number, because it is equal to 879624²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 114457715856 + 659280665521 = 338316^2 + 811961^2 .

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 773738381377 - 2²⁷ = 773604163649 is a prime.

It is a super-2 number, since 2×773738381377² (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 (773738381387) 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, 913213 + ... + 1543189.

It is an arithmetic number, because the mean of its divisors is an integer number (104158357597).

Almost surely, 2^773738381377 is an apocalyptic number.

It is an amenable number.

773738381377 is a deficient number, since it is larger than the sum of its proper divisors (59528479399).

773738381377 is a wasteful number, since it uses less digits than its factorization.

773738381377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 724467.

The product of its digits is 87127488, while the sum is 64.

The spelling of 773738381377 in words is "seven hundred seventy-three billion, seven hundred thirty-eight million, three hundred eighty-one thousand, three hundred seventy-seven".