134621642791 has 2 divisors, whose sum is σ = 134621642792. Its totient is φ = 134621642790.

The previous prime is 134621642713. The next prime is 134621642807. The reversal of 134621642791 is 197246126431.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-134621642791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (134621642291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67310821395 + 67310821396.

It is an arithmetic number, because the mean of its divisors is an integer number (67310821396).

Almost surely, 2^134621642791 is an apocalyptic number.

134621642791 is a deficient number, since it is larger than the sum of its proper divisors (1).

134621642791 is an equidigital number, since it uses as much as digits as its factorization.

134621642791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435456, while the sum is 46.

The spelling of 134621642791 in words is "one hundred thirty-four billion, six hundred twenty-one million, six hundred forty-two thousand, seven hundred ninety-one".