771291590161 has 12 divisors (see below), whose sum is σ = 836023046772. Its totient is φ = 710948708064.

The previous prime is 771291590117. The next prime is 771291590243. The reversal of 771291590161 is 161095192177.

It is a happy number.

771291590161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 535648334400 + 235643255761 = 731880^2 + 485431^2 .

It is not a de Polignac number, because 771291590161 - 2²³ = 771283201553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (771291540161) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28858830 + ... + 28885543.

It is an arithmetic number, because the mean of its divisors is an integer number (69668587231).

Almost surely, 2^771291590161 is an apocalyptic number.

It is an amenable number.

771291590161 is a deficient number, since it is larger than the sum of its proper divisors (64731456611).

771291590161 is a wasteful number, since it uses less digits than its factorization.

771291590161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57744448 (or 57744429 counting only the distinct ones).

The product of its (nonzero) digits is 238140, while the sum is 49.

The spelling of 771291590161 in words is "seven hundred seventy-one billion, two hundred ninety-one million, five hundred ninety thousand, one hundred sixty-one".