1179571938561 has 9 divisors (see below), whose sum is σ = 1703830839841. Its totient is φ = 786379120212.

The previous prime is 1179571938551. The next prime is 1179571938613. The reversal of 1179571938561 is 1658391759711.

The square root of 1179571938561 is 1086081.

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

1179571938561 is a `hidden beast` number, since 1 + 1 + 7 + 9 + 57 + 19 + 3 + 8 + 561 = 666.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 1179571938561 - 2²³ = 1179563549953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1179571938541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3077230 + ... + 3439256.

Almost surely, 2^{1179571938561} is an apocalyptic number.

1179571938561 is the 1086081-st square number.

1179571938561 is the 543041-st centered octagonal number.

It is an amenable number.

1179571938561 is a deficient number, since it is larger than the sum of its proper divisors (524258901280).

1179571938561 is an frugal number, since it uses more digits than its factorization.

1179571938561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 724060 (or 362030 counting only the distinct ones).

The product of its digits is 14288400, while the sum is 63.

The spelling of 1179571938561 in words is "one trillion, one hundred seventy-nine billion, five hundred seventy-one million, nine hundred thirty-eight thousand, five hundred sixty-one".