1181811078633 has 4 divisors (see below), whose sum is σ = 1575748104848. Its totient is φ = 787874052420.

The previous prime is 1181811078587. The next prime is 1181811078659. The reversal of 1181811078633 is 3368701181811.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1181811078633 - 2¹⁸ = 1181810816489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1181811078683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 196968513103 + ... + 196968513108.

It is an arithmetic number, because the mean of its divisors is an integer number (393937026212).

Almost surely, 2^{1181811078633} is an apocalyptic number.

It is an amenable number.

1181811078633 is a deficient number, since it is larger than the sum of its proper divisors (393937026215).

1181811078633 is an equidigital number, since it uses as much as digits as its factorization.

1181811078633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393937026214.

The product of its (nonzero) digits is 193536, while the sum is 48.

The spelling of 1181811078633 in words is "one trillion, one hundred eighty-one billion, eight hundred eleven million, seventy-eight thousand, six hundred thirty-three".