775369984579 has 4 divisors (see below), whose sum is σ = 786942670984. Its totient is φ = 763797298176.

The previous prime is 775369984559. The next prime is 775369984703. The reversal of 775369984579 is 975489963577.

It is a happy number.

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 775369984579 - 2²³ = 775361595971 is a prime.

It is a super-2 number, since 2×775369984579² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 775369984499 and 775369984508.

It is not an unprimeable number, because it can be changed into a prime (775369984559) 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, 5786343102 + ... + 5786343235.

It is an arithmetic number, because the mean of its divisors is an integer number (196735667746).

Almost surely, 2^775369984579 is an apocalyptic number.

775369984579 is a deficient number, since it is larger than the sum of its proper divisors (11572686405).

775369984579 is a wasteful number, since it uses less digits than its factorization.

775369984579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11572686404.

The product of its digits is 3600676800, while the sum is 79.

The spelling of 775369984579 in words is "seven hundred seventy-five billion, three hundred sixty-nine million, nine hundred eighty-four thousand, five hundred seventy-nine".