1210779773668 has 6 divisors (see below), whose sum is σ = 2118864603926. Its totient is φ = 605389886832.

The previous prime is 1210779773663. The next prime is 1210779773677. The reversal of 1210779773668 is 8663779770121.

It can be written as a sum of positive squares in only one way, i.e., 1089535140864 + 121244632804 = 1043808^2 + 348202^2 .

It is not an unprimeable number, because it can be changed into a prime (1210779773663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 151347471705 + ... + 151347471712.

Almost surely, 2^{1210779773668} is an apocalyptic number.

It is an amenable number.

1210779773668 is a deficient number, since it is larger than the sum of its proper divisors (908084830258).

1210779773668 is a wasteful number, since it uses less digits than its factorization.

1210779773668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302694943421 (or 302694943419 counting only the distinct ones).

The product of its (nonzero) digits is 37340352, while the sum is 64.

The spelling of 1210779773668 in words is "one trillion, two hundred ten billion, seven hundred seventy-nine million, seven hundred seventy-three thousand, six hundred sixty-eight".