771080809122 has 378 divisors, whose sum is σ = 1977183614601. Its totient is φ = 225319086720.

The previous prime is 771080809111. The next prime is 771080809181. The reversal of 771080809122 is 221908080177.

It can be written as a sum of positive squares in 14 ways, for example, as 524887209081 + 246193600041 = 724491^2 + 496179^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=620919.

It is a super-2 number, since 2×771080809122² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 188 ways as a sum of consecutive naturals, for example, 12640668972 + ... + 12640669032.

Almost surely, 2^771080809122 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 771080809122

771080809122 is an abundant number, since it is smaller than the sum of its proper divisors (1206102805479).

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

771080809122 is an equidigital number, since it uses as much as digits as its factorization.

771080809122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226 (or 108 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 45.

Adding to 771080809122 its reverse (221908080177), we get a palindrome (992988889299).

The spelling of 771080809122 in words is "seven hundred seventy-one billion, eighty million, eight hundred nine thousand, one hundred twenty-two".