2159992843997 has 2 divisors, whose sum is σ = 2159992843998. Its totient is φ = 2159992843996.

The previous prime is 2159992843993. The next prime is 2159992844017. The reversal of 2159992843997 is 7993482999512.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1593504800281 + 566488043716 = 1262341^2 + 752654^2 .

It is a cyclic number.

It is not a de Polignac number, because 2159992843997 - 2² = 2159992843993 is a prime.

It is a super-2 number, since 2×2159992843997² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2159992843993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1079996421998 + 1079996421999.

It is an arithmetic number, because the mean of its divisors is an integer number (1079996421999).

Almost surely, 2^{2159992843997} is an apocalyptic number.

It is an amenable number.

2159992843997 is a deficient number, since it is larger than the sum of its proper divisors (1).

2159992843997 is an equidigital number, since it uses as much as digits as its factorization.

2159992843997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 793618560, while the sum is 77.

The spelling of 2159992843997 in words is "two trillion, one hundred fifty-nine billion, nine hundred ninety-two million, eight hundred forty-three thousand, nine hundred ninety-seven".