1156056021859 has 2 divisors, whose sum is σ = 1156056021860. Its totient is φ = 1156056021858.

The previous prime is 1156056021821. The next prime is 1156056021881. The reversal of 1156056021859 is 9581206506511.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1156056021859 - 2³⁷ = 1018617068387 is a prime.

It is not a weakly prime, because it can be changed into another prime (1156056021559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 578028010929 + 578028010930.

It is an arithmetic number, because the mean of its divisors is an integer number (578028010930).

Almost surely, 2^{1156056021859} is an apocalyptic number.

1156056021859 is a deficient number, since it is larger than the sum of its proper divisors (1).

1156056021859 is an equidigital number, since it uses as much as digits as its factorization.

1156056021859 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648000, while the sum is 49.

The spelling of 1156056021859 in words is "one trillion, one hundred fifty-six billion, fifty-six million, twenty-one thousand, eight hundred fifty-nine".