771894491297 has 2 divisors, whose sum is σ = 771894491298. Its totient is φ = 771894491296.

The previous prime is 771894491257. The next prime is 771894491429. The reversal of 771894491297 is 792194498177.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 522734784016 + 249159707281 = 723004^2 + 499159^2 .

It is a cyclic number.

It is not a de Polignac number, because 771894491297 - 2¹² = 771894487201 is a prime.

It is a super-2 number, since 2×771894491297² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (771894491237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 385947245648 + 385947245649.

It is an arithmetic number, because the mean of its divisors is an integer number (385947245649).

Almost surely, 2^771894491297 is an apocalyptic number.

It is an amenable number.

771894491297 is a deficient number, since it is larger than the sum of its proper divisors (1).

771894491297 is an equidigital number, since it uses as much as digits as its factorization.

771894491297 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64012032, while the sum is 68.

The spelling of 771894491297 in words is "seven hundred seventy-one billion, eight hundred ninety-four million, four hundred ninety-one thousand, two hundred ninety-seven".