2782986909991 has 2 divisors, whose sum is σ = 2782986909992. Its totient is φ = 2782986909990.

The previous prime is 2782986909973. The next prime is 2782986910031. The reversal of 2782986909991 is 1999096892872.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2782986909991 - 2⁷ = 2782986909863 is a prime.

It is a super-2 number, since 2×2782986909991² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2782986901991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1391493454995 + 1391493454996.

It is an arithmetic number, because the mean of its divisors is an integer number (1391493454996).

Almost surely, 2^{2782986909991} is an apocalyptic number.

2782986909991 is a deficient number, since it is larger than the sum of its proper divisors (1).

2782986909991 is an equidigital number, since it uses as much as digits as its factorization.

2782986909991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 634894848, while the sum is 79.

The spelling of 2782986909991 in words is "two trillion, seven hundred eighty-two billion, nine hundred eighty-six million, nine hundred nine thousand, nine hundred ninety-one".