1951204707161 has 2 divisors, whose sum is σ = 1951204707162. Its totient is φ = 1951204707160.

The previous prime is 1951204707107. The next prime is 1951204707259. The reversal of 1951204707161 is 1617074021591.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1629148457161 + 322056250000 = 1276381^2 + 567500^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1951204707161 is a prime.

It is not a weakly prime, because it can be changed into another prime (1951204107161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 975602353580 + 975602353581.

It is an arithmetic number, because the mean of its divisors is an integer number (975602353581).

Almost surely, 2^{1951204707161} is an apocalyptic number.

It is an amenable number.

1951204707161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1951204707161 is an equidigital number, since it uses as much as digits as its factorization.

1951204707161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 105840, while the sum is 44.

The spelling of 1951204707161 in words is "one trillion, nine hundred fifty-one billion, two hundred four million, seven hundred seven thousand, one hundred sixty-one".