2101782609379 has 2 divisors, whose sum is σ = 2101782609380. Its totient is φ = 2101782609378.

The previous prime is 2101782609371. The next prime is 2101782609461. The reversal of 2101782609379 is 9739062871012.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2101782609379 - 2³ = 2101782609371 is a prime.

It is not a weakly prime, because it can be changed into another prime (2101782609371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050891304689 + 1050891304690.

It is an arithmetic number, because the mean of its divisors is an integer number (1050891304690).

Almost surely, 2^{2101782609379} is an apocalyptic number.

2101782609379 is a deficient number, since it is larger than the sum of its proper divisors (1).

2101782609379 is an equidigital number, since it uses as much as digits as its factorization.

2101782609379 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2286144, while the sum is 55.

The spelling of 2101782609379 in words is "two trillion, one hundred one billion, seven hundred eighty-two million, six hundred nine thousand, three hundred seventy-nine".