2046978991969 has 2 divisors, whose sum is σ = 2046978991970. Its totient is φ = 2046978991968.

The previous prime is 2046978991931. The next prime is 2046978992011. The reversal of 2046978991969 is 9691998796402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1642788214369 + 404190777600 = 1281713^2 + 635760^2 .

It is a cyclic number.

It is not a de Polignac number, because 2046978991969 - 2²⁹ = 2046442121057 is a prime.

It is a super-2 number, since 2×2046978991969² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2046978991769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1023489495984 + 1023489495985.

It is an arithmetic number, because the mean of its divisors is an integer number (1023489495985).

Almost surely, 2^{2046978991969} is an apocalyptic number.

It is an amenable number.

2046978991969 is a deficient number, since it is larger than the sum of its proper divisors (1).

2046978991969 is an equidigital number, since it uses as much as digits as its factorization.

2046978991969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 952342272, while the sum is 79.

The spelling of 2046978991969 in words is "two trillion, forty-six billion, nine hundred seventy-eight million, nine hundred ninety-one thousand, nine hundred sixty-nine".