1196138129761 has 3 divisors (see below), whose sum is σ = 1196139223443. Its totient is φ = 1196137036080.

The previous prime is 1196138129749. The next prime is 1196138129819. The reversal of 1196138129761 is 1679218316911.

It is a happy number.

The square root of 1196138129761 is 1093681.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 1152790889761 + 43347240000 = 1073681^2 + 208200^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1196138129761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1196138129731) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 546841 + ... + 1640521.

It is an arithmetic number, because the mean of its divisors is an integer number (398713074481).

Almost surely, 2^{1196138129761} is an apocalyptic number.

1196138129761 is the 1093681-st square number.

1196138129761 is the 546841-st centered octagonal number.

It is an amenable number.

1196138129761 is a deficient number, since it is larger than the sum of its proper divisors (1093682).

1196138129761 is an frugal number, since it uses more digits than its factorization.

1196138129761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2187362 (or 1093681 counting only the distinct ones).

The product of its digits is 979776, while the sum is 55.

The spelling of 1196138129761 in words is "one trillion, one hundred ninety-six billion, one hundred thirty-eight million, one hundred twenty-nine thousand, seven hundred sixty-one".