1181992968025 has 9 divisors (see below), whose sum is σ = 1465678020991. Its totient is φ = 945590025640.

The previous prime is 1181992968001. The next prime is 1181992968073. The reversal of 1181992968025 is 5208692991811.

The square root of 1181992968025 is 1087195.

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., 425517468489 + 756475499536 = 652317^2 + 869756^2 .

It is not a de Polignac number, because 1181992968025 - 2¹¹ = 1181992965977 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 5327256 + ... + 5544694.

Almost surely, 2^{1181992968025} is an apocalyptic number.

1181992968025 is the 1087195-th square number.

1181992968025 is the 543598-th centered octagonal number.

It is an amenable number.

1181992968025 is a deficient number, since it is larger than the sum of its proper divisors (283685052966).

1181992968025 is an frugal number, since it uses more digits than its factorization.

1181992968025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434888 (or 217444 counting only the distinct ones).

The product of its (nonzero) digits is 5598720, while the sum is 61.

The spelling of 1181992968025 in words is "one trillion, one hundred eighty-one billion, nine hundred ninety-two million, nine hundred sixty-eight thousand, twenty-five".