6156994993 has 2 divisors, whose sum is σ = 6156994994. Its totient is φ = 6156994992.

The previous prime is 6156994979. The next prime is 6156994999. The reversal of 6156994993 is 3994996516.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5842003489 + 314991504 = 76433^2 + 17748^2 .

It is a cyclic number.

It is not a de Polignac number, because 6156994993 - 2²¹ = 6154897841 is a prime.

It is not a weakly prime, because it can be changed into another prime (6156994999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3078497496 + 3078497497.

It is an arithmetic number, because the mean of its divisors is an integer number (3078497497).

Almost surely, 2^6156994993 is an apocalyptic number.

It is an amenable number.

6156994993 is a deficient number, since it is larger than the sum of its proper divisors (1).

6156994993 is an equidigital number, since it uses as much as digits as its factorization.

6156994993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14171760, while the sum is 61.

The square root of 6156994993 is about 78466.5214789084. The cubic root of 6156994993 is about 1832.8331594621.

The spelling of 6156994993 in words is "six billion, one hundred fifty-six million, nine hundred ninety-four thousand, nine hundred ninety-three".