774023549440 has 80 divisors (see below), whose sum is σ = 1856357937720. Its totient is φ = 309523415040.

The previous prime is 774023549419. The next prime is 774023549461. The reversal of 774023549440 is 44945320477.

It is an interprime number because it is at equal distance from previous prime (774023549419) and next prime (774023549461).

It can be written as a sum of positive squares in 4 ways, for example, as 710527613184 + 63495936256 = 842928^2 + 251984^2 .

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×774023549440² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9608530 + ... + 9688750.

Almost surely, 2^774023549440 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 774023549440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (928178968860).

774023549440 is an abundant number, since it is smaller than the sum of its proper divisors (1082334388280).

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

774023549440 is an equidigital number, since it uses as much as digits as its factorization.

774023549440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84013 (or 83997 counting only the distinct ones).

The product of its (nonzero) digits is 3386880, while the sum is 49.

The spelling of 774023549440 in words is "seven hundred seventy-four billion, twenty-three million, five hundred forty-nine thousand, four hundred forty".