775772964394 has 4 divisors (see below), whose sum is σ = 1163659446594. Its totient is φ = 387886482196.

The previous prime is 775772964389. The next prime is 775772964403. The reversal of 775772964394 is 493469277577.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 493469277577 = 9029 ⋅54653813.

It can be written as a sum of positive squares in only one way, i.e., 658800072225 + 116972892169 = 811665^2 + 342013^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 193943241097 + ... + 193943241100.

Almost surely, 2^775772964394 is an apocalyptic number.

775772964394 is a deficient number, since it is larger than the sum of its proper divisors (387886482200).

775772964394 is a wasteful number, since it uses less digits than its factorization.

775772964394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387886482199.

The product of its digits is 560105280, while the sum is 70.

The spelling of 775772964394 in words is "seven hundred seventy-five billion, seven hundred seventy-two million, nine hundred sixty-four thousand, three hundred ninety-four".