771234816 has 176 divisors, whose sum is σ = 2322771840. Its totient is φ = 225361920.

The previous prime is 771234811. The next prime is 771234847. The reversal of 771234816 is 618432177.

It is a tau number, because it is divible by the number of its divisors (176).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (771234811) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 979575 + ... + 980361.

Almost surely, 2^771234816 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 771234816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1161385920).

771234816 is an abundant number, since it is smaller than the sum of its proper divisors (1551537024).

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

771234816 is a wasteful number, since it uses less digits than its factorization.

771234816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 850 (or 832 counting only the distinct ones).

The product of its digits is 56448, while the sum is 39.

The square root of 771234816 is about 27771.1147777686. The cubic root of 771234816 is about 917.0553361090.

The spelling of 771234816 in words is "seven hundred seventy-one million, two hundred thirty-four thousand, eight hundred sixteen".