1995961254019 has 2 divisors, whose sum is σ = 1995961254020. Its totient is φ = 1995961254018.

The previous prime is 1995961253999. The next prime is 1995961254029. The reversal of 1995961254019 is 9104521695991.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1995961254019 - 2⁵ = 1995961253987 is a prime.

It is a super-2 number, since 2×1995961254019² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1995961254029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 997980627009 + 997980627010.

It is an arithmetic number, because the mean of its divisors is an integer number (997980627010).

Almost surely, 2^{1995961254019} is an apocalyptic number.

1995961254019 is a deficient number, since it is larger than the sum of its proper divisors (1).

1995961254019 is an equidigital number, since it uses as much as digits as its factorization.

1995961254019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7873200, while the sum is 61.

The spelling of 1995961254019 in words is "one trillion, nine hundred ninety-five billion, nine hundred sixty-one million, two hundred fifty-four thousand, nineteen".