1151116555801 has 3 divisors (see below), whose sum is σ = 1151117628703. Its totient is φ = 1151115482900.

The previous prime is 1151116555781. The next prime is 1151116555807. The reversal of 1151116555801 is 1085556111511.

The square root of 1151116555801 is 1072901.

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., 85060305801 + 1066056250000 = 291651^2 + 1032500^2 .

It is not a de Polignac number, because 1151116555801 - 2⁹ = 1151116555289 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1151116555807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 536451 + ... + 1609351.

Almost surely, 2^{1151116555801} is an apocalyptic number.

1151116555801 is the 1072901-st square number.

1151116555801 is the 536451-st centered octagonal number.

It is an amenable number.

1151116555801 is a deficient number, since it is larger than the sum of its proper divisors (1072902).

1151116555801 is an frugal number, since it uses more digits than its factorization.

1151116555801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2145802 (or 1072901 counting only the distinct ones).

The product of its (nonzero) digits is 30000, while the sum is 40.

The spelling of 1151116555801 in words is "one trillion, one hundred fifty-one billion, one hundred sixteen million, five hundred fifty-five thousand, eight hundred one".