771607438322 has 54 divisors (see below), whose sum is σ = 1363041184167. Its totient is φ = 326645339328.

The previous prime is 771607438313. The next prime is 771607438373. The reversal of 771607438322 is 223834706177.

It can be written as a sum of positive squares in 5 ways, for example, as 440578665121 + 331028773201 = 663761^2 + 575351^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=621131.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 773928728 + ... + 773929724.

Almost surely, 2^771607438322 is an apocalyptic number.

771607438322 is a deficient number, since it is larger than the sum of its proper divisors (591433745845).

771607438322 is an frugal number, since it uses more digits than its factorization.

771607438322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2188 (or 1095 counting only the distinct ones).

The product of its (nonzero) digits is 2370816, while the sum is 50.

Multiplying 771607438322 by its sum of digits (50), we get a square (38580371916100 = 6211310²).

The spelling of 771607438322 in words is "seven hundred seventy-one billion, six hundred seven million, four hundred thirty-eight thousand, three hundred twenty-two".