771223680 has 512 divisors, whose sum is σ = 3011040000. Its totient is φ = 188116992.

The previous prime is 771223669. The next prime is 771223729. The reversal of 771223680 is 86322177.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 26593906 + ... + 26593934.

Almost surely, 2^771223680 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 771223680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1505520000).

771223680 is an abundant number, since it is smaller than the sum of its proper divisors (2239816320).

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

771223680 is an equidigital number, since it uses as much as digits as its factorization.

771223680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88 (or 58 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The square root of 771223680 is about 27770.9142809523. The cubic root of 771223680 is about 917.0509222447.

It can be divided in two parts, 771223 and 680, that added together give a triangular number (771903 = T₁₂₄₂).

The spelling of 771223680 in words is "seven hundred seventy-one million, two hundred twenty-three thousand, six hundred eighty".