1156051109 has 2 divisors, whose sum is σ = 1156051110. Its totient is φ = 1156051108.

The previous prime is 1156051097. The next prime is 1156051111. The reversal of 1156051109 is 9011506511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1127482084 + 28569025 = 33578^2 + 5345^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1156051109 is a prime.

Together with 1156051111, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1156051159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 578025554 + 578025555.

It is an arithmetic number, because the mean of its divisors is an integer number (578025555).

Almost surely, 2^1156051109 is an apocalyptic number.

It is an amenable number.

1156051109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1156051109 is an equidigital number, since it uses as much as digits as its factorization.

1156051109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1350, while the sum is 29.

The square root of 1156051109 is about 34000.7515946339. The cubic root of 1156051109 is about 1049.5239290040.

The spelling of 1156051109 in words is "one billion, one hundred fifty-six million, fifty-one thousand, one hundred nine".