771336216 has 128 divisors (see below), whose sum is σ = 2489126400. Its totient is φ = 216743040.

The previous prime is 771336199. The next prime is 771336221. The reversal of 771336216 is 612633177.

771336216 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×771336216² = 1189919116226397312, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 88051 + ... + 96413.

It is an arithmetic number, because the mean of its divisors is an integer number (19446300).

Almost surely, 2^771336216 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 771336216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1244563200).

771336216 is an abundant number, since it is smaller than the sum of its proper divisors (1717790184).

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

771336216 is a wasteful number, since it uses less digits than its factorization.

771336216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8446 (or 8436 counting only the distinct ones).

The product of its digits is 31752, while the sum is 36.

The square root of 771336216 is about 27772.9403556771. The cubic root of 771336216 is about 917.0955250519.

The spelling of 771336216 in words is "seven hundred seventy-one million, three hundred thirty-six thousand, two hundred sixteen".