1182157438409 has 2 divisors, whose sum is σ = 1182157438410. Its totient is φ = 1182157438408.

The previous prime is 1182157438391. The next prime is 1182157438453. The reversal of 1182157438409 is 9048347512811.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 641285444809 + 540871993600 = 800803^2 + 735440^2 .

It is a cyclic number.

It is not a de Polignac number, because 1182157438409 - 2²⁰ = 1182156389833 is a prime.

It is not a weakly prime, because it can be changed into another prime (1182157438459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 591078719204 + 591078719205.

It is an arithmetic number, because the mean of its divisors is an integer number (591078719205).

Almost surely, 2^{1182157438409} is an apocalyptic number.

It is an amenable number.

1182157438409 is a deficient number, since it is larger than the sum of its proper divisors (1).

1182157438409 is an equidigital number, since it uses as much as digits as its factorization.

1182157438409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1935360, while the sum is 53.

The spelling of 1182157438409 in words is "one trillion, one hundred eighty-two billion, one hundred fifty-seven million, four hundred thirty-eight thousand, four hundred nine".