1181138280643 has 16 divisors (see below), whose sum is σ = 1194402132000. Its totient is φ = 1167945891840.

The previous prime is 1181138280617. The next prime is 1181138280653. The reversal of 1181138280643 is 3460828311811.

It is a cyclic number.

It is not a de Polignac number, because 1181138280643 - 2¹⁷ = 1181138149571 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1181138280593 and 1181138280602.

It is not an unprimeable number, because it can be changed into a prime (1181138280653) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45218755 + ... + 45244867.

It is an arithmetic number, because the mean of its divisors is an integer number (74650133250).

Almost surely, 2^{1181138280643} is an apocalyptic number.

1181138280643 is a deficient number, since it is larger than the sum of its proper divisors (13263851357).

1181138280643 is a wasteful number, since it uses less digits than its factorization.

1181138280643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27462.

The product of its (nonzero) digits is 221184, while the sum is 46.

The spelling of 1181138280643 in words is "one trillion, one hundred eighty-one billion, one hundred thirty-eight million, two hundred eighty thousand, six hundred forty-three".