1191223810624 has 21 divisors (see below), whose sum is σ = 2363852075817. Its totient is φ = 595607539584.

The previous prime is 1191223810559. The next prime is 1191223810649. The reversal of 1191223810624 is 4260183221911.

The square root of 1191223810624 is 1091432.

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

It can be written as a sum of positive squares in only one way, i.e., 855565801024 + 335658009600 = 924968^2 + 579360^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 8663242 + ... + 8799670.

Almost surely, 2^{1191223810624} is an apocalyptic number.

1191223810624 is the 1091432-nd square number.

It is an amenable number.

1191223810624 is a deficient number, since it is larger than the sum of its proper divisors (1172628265193).

1191223810624 is an frugal number, since it uses more digits than its factorization.

1191223810624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272870 (or 136431 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 40.

The spelling of 1191223810624 in words is "one trillion, one hundred ninety-one billion, two hundred twenty-three million, eight hundred ten thousand, six hundred twenty-four".