1155867823541 has 2 divisors, whose sum is σ = 1155867823542. Its totient is φ = 1155867823540.

The previous prime is 1155867823507. The next prime is 1155867823639. The reversal of 1155867823541 is 1453287685511.

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., 869455542916 + 286412280625 = 932446^2 + 535175^2 .

It is a cyclic number.

It is not a de Polignac number, because 1155867823541 - 2⁶ = 1155867823477 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1155860823541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 577933911770 + 577933911771.

It is an arithmetic number, because the mean of its divisors is an integer number (577933911771).

Almost surely, 2^{1155867823541} is an apocalyptic number.

It is an amenable number.

1155867823541 is a deficient number, since it is larger than the sum of its proper divisors (1).

1155867823541 is an equidigital number, since it uses as much as digits as its factorization.

1155867823541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8064000, while the sum is 56.

The spelling of 1155867823541 in words is "one trillion, one hundred fifty-five billion, eight hundred sixty-seven million, eight hundred twenty-three thousand, five hundred forty-one".