774406664820 has 72 divisors (see below), whose sum is σ = 2412520963944. Its totient is φ = 200927132928.

The previous prime is 774406664777. The next prime is 774406664833. The reversal of 774406664820 is 28466604477.

It can be written as a sum of positive squares in 4 ways, for example, as 71616182544 + 702790482276 = 267612^2 + 838326^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 58131979 + ... + 58145298.

Almost surely, 2^774406664820 is an apocalyptic number.

It is an amenable number.

774406664820 is an abundant number, since it is smaller than the sum of its proper divisors (1638114299124).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

774406664820 is a wasteful number, since it uses less digits than its factorization.

774406664820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116277329 (or 116277324 counting only the distinct ones).

The product of its (nonzero) digits is 10838016, while the sum is 54.

The spelling of 774406664820 in words is "seven hundred seventy-four billion, four hundred six million, six hundred sixty-four thousand, eight hundred twenty".