771162216 has 128 divisors (see below), whose sum is σ = 2220825600. Its totient is φ = 220858880.

The previous prime is 771162209. The next prime is 771162221. The reversal of 771162216 is 612261177.

It is a Harshad number since it is a multiple of its sum of digits (33).

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, 539695 + ... + 541121.

It is an arithmetic number, because the mean of its divisors is an integer number (17350200).

Almost surely, 2^771162216 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 771162216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1110412800).

771162216 is an abundant number, since it is smaller than the sum of its proper divisors (1449663384).

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

771162216 is a wasteful number, since it uses less digits than its factorization.

771162216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1559 (or 1555 counting only the distinct ones).

The product of its digits is 7056, while the sum is 33.

The square root of 771162216 is about 27769.8076334713. The cubic root of 771162216 is about 917.0265596131.

The spelling of 771162216 in words is "seven hundred seventy-one million, one hundred sixty-two thousand, two hundred sixteen".