2191096147939 has 2 divisors, whose sum is σ = 2191096147940. Its totient is φ = 2191096147938.

The previous prime is 2191096147913. The next prime is 2191096147991. The reversal of 2191096147939 is 9397416901912.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2191096147939 is a prime.

It is not a weakly prime, because it can be changed into another prime (2191096187939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1095548073969 + 1095548073970.

It is an arithmetic number, because the mean of its divisors is an integer number (1095548073970).

Almost surely, 2^{2191096147939} is an apocalyptic number.

2191096147939 is a deficient number, since it is larger than the sum of its proper divisors (1).

2191096147939 is an equidigital number, since it uses as much as digits as its factorization.

2191096147939 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6613488, while the sum is 61.

The spelling of 2191096147939 in words is "two trillion, one hundred ninety-one billion, ninety-six million, one hundred forty-seven thousand, nine hundred thirty-nine".