773900391745 has 32 divisors (see below), whose sum is σ = 1038897810720. Its totient is φ = 549499023360.

The previous prime is 773900391739. The next prime is 773900391779. The reversal of 773900391745 is 547193009377.

It can be written as a sum of positive squares in 16 ways, for example, as 344446914816 + 429453476929 = 586896^2 + 655327^2 .

It is not a de Polignac number, because 773900391745 - 2¹¹ = 773900389697 is a prime.

It is a Smith number, since the sum of its digits (55) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 397494 + ... + 1306063.

It is an arithmetic number, because the mean of its divisors is an integer number (32465556585).

Almost surely, 2^773900391745 is an apocalyptic number.

It is an amenable number.

773900391745 is a deficient number, since it is larger than the sum of its proper divisors (264997418975).

773900391745 is a wasteful number, since it uses less digits than its factorization.

773900391745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1703845.

The product of its (nonzero) digits is 5000940, while the sum is 55.

The spelling of 773900391745 in words is "seven hundred seventy-three billion, nine hundred million, three hundred ninety-one thousand, seven hundred forty-five".