6156977909 has 2 divisors, whose sum is σ = 6156977910. Its totient is φ = 6156977908.

The previous prime is 6156977837. The next prime is 6156977923. The reversal of 6156977909 is 9097796516.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4829833009 + 1327144900 = 69497^2 + 36430^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6156977909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6156977999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3078488954 + 3078488955.

It is an arithmetic number, because the mean of its divisors is an integer number (3078488955).

Almost surely, 2^6156977909 is an apocalyptic number.

It is an amenable number.

6156977909 is a deficient number, since it is larger than the sum of its proper divisors (1).

6156977909 is an equidigital number, since it uses as much as digits as its factorization.

6156977909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6429780, while the sum is 59.

The square root of 6156977909 is about 78466.4126171192. The cubic root of 6156977909 is about 1832.8314642547.

The spelling of 6156977909 in words is "six billion, one hundred fifty-six million, nine hundred seventy-seven thousand, nine hundred nine".