771305216 has 36 divisors (see below), whose sum is σ = 1679567064. Its totient is φ = 350592000.

The previous prime is 771305201. The next prime is 771305263. The reversal of 771305216 is 612503177.

771305216 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134135 + ... + 139766.

Almost surely, 2^771305216 is an apocalyptic number.

It is an amenable number.

771305216 is an abundant number, since it is smaller than the sum of its proper divisors (908261848).

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

771305216 is a wasteful number, since it uses less digits than its factorization.

771305216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273928 (or 273914 counting only the distinct ones).

The product of its (nonzero) digits is 8820, while the sum is 32.

The square root of 771305216 is about 27772.3822528785. The cubic root of 771305216 is about 917.0832388653.

The spelling of 771305216 in words is "seven hundred seventy-one million, three hundred five thousand, two hundred sixteen".