1961792503169 has 2 divisors, whose sum is σ = 1961792503170. Its totient is φ = 1961792503168.

The previous prime is 1961792503163. The next prime is 1961792503183. The reversal of 1961792503169 is 9613052971691.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1943202544144 + 18589959025 = 1393988^2 + 136345^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1961792503169 is a prime.

It is a super-2 number, since 2×1961792503169² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1961792503163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 980896251584 + 980896251585.

It is an arithmetic number, because the mean of its divisors is an integer number (980896251585).

Almost surely, 2^{1961792503169} is an apocalyptic number.

It is an amenable number.

1961792503169 is a deficient number, since it is larger than the sum of its proper divisors (1).

1961792503169 is an equidigital number, since it uses as much as digits as its factorization.

1961792503169 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5511240, while the sum is 59.

The spelling of 1961792503169 in words is "one trillion, nine hundred sixty-one billion, seven hundred ninety-two million, five hundred three thousand, one hundred sixty-nine".