773138508251 has 4 divisors (see below), whose sum is σ = 777409991904. Its totient is φ = 768867024600.

The previous prime is 773138508223. The next prime is 773138508253. The reversal of 773138508251 is 152805831377.

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

It is a cyclic number.

It is not a de Polignac number, because 773138508251 - 2³⁰ = 772064766427 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 773138508251.

It is not an unprimeable number, because it can be changed into a prime (773138508253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2135741555 + ... + 2135741916.

It is an arithmetic number, because the mean of its divisors is an integer number (194352497976).

Almost surely, 2^773138508251 is an apocalyptic number.

773138508251 is a deficient number, since it is larger than the sum of its proper divisors (4271483653).

773138508251 is a wasteful number, since it uses less digits than its factorization.

773138508251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4271483652.

The product of its (nonzero) digits is 1411200, while the sum is 50.

The spelling of 773138508251 in words is "seven hundred seventy-three billion, one hundred thirty-eight million, five hundred eight thousand, two hundred fifty-one".