34155181961 has 2 divisors, whose sum is σ = 34155181962. Its totient is φ = 34155181960.

The previous prime is 34155181943. The next prime is 34155181993. The reversal of 34155181961 is 16918155143.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29474022400 + 4681159561 = 171680^2 + 68419^2 .

It is an emirp because it is prime and its reverse (16918155143) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-34155181961 is a prime.

It is not a weakly prime, because it can be changed into another prime (34155181561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17077590980 + 17077590981.

It is an arithmetic number, because the mean of its divisors is an integer number (17077590981).

Almost surely, 2^34155181961 is an apocalyptic number.

It is an amenable number.

34155181961 is a deficient number, since it is larger than the sum of its proper divisors (1).

34155181961 is an equidigital number, since it uses as much as digits as its factorization.

34155181961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 129600, while the sum is 44.

The spelling of 34155181961 in words is "thirty-four billion, one hundred fifty-five million, one hundred eighty-one thousand, nine hundred sixty-one".