1154773756816 has 45 divisors (see below), whose sum is σ = 2376876583921. Its totient is φ = 543388557056.

The previous prime is 1154773756811. The next prime is 1154773756817. The reversal of 1154773756816 is 6186573774511.

The square root of 1154773756816 is 1074604.

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., 899045312400 + 255728444416 = 948180^2 + 505696^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1154773756811) 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, 73065171 + ... + 73080973.

Almost surely, 2^{1154773756816} is an apocalyptic number.

1154773756816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

1154773756816 is the 1074604-th square number.

It is an amenable number.

1154773756816 is an abundant number, since it is smaller than the sum of its proper divisors (1222102827105).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1154773756816 is an frugal number, since it uses more digits than its factorization.

1154773756816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31648 (or 15822 counting only the distinct ones).

The product of its digits is 29635200, while the sum is 61.

The spelling of 1154773756816 in words is "one trillion, one hundred fifty-four billion, seven hundred seventy-three million, seven hundred fifty-six thousand, eight hundred sixteen".