77804474771444 has 12 divisors (see below), whose sum is σ = 136158375135300. Its totient is φ = 38902081875648.

The previous prime is 77804474771431. The next prime is 77804474771449. The reversal of 77804474771444 is 44417747440877.

It can be written as a sum of positive squares in 2 ways, for example, as 16970527420900 + 60833947350544 = 4119530^2 + 7799612^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77804474771449) 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, 37748159 + ... + 39755910.

It is an arithmetic number, because the mean of its divisors is an integer number (11346531261275).

Almost surely, 2^{77804474771444} is an apocalyptic number.

It is an amenable number.

77804474771444 is a deficient number, since it is larger than the sum of its proper divisors (58353900363856).

77804474771444 is a wasteful number, since it uses less digits than its factorization.

77804474771444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77755042 (or 77755040 counting only the distinct ones).

The product of its (nonzero) digits is 550731776, while the sum is 68.

The spelling of 77804474771444 in words is "seventy-seven trillion, eight hundred four billion, four hundred seventy-four million, seven hundred seventy-one thousand, four hundred forty-four".