1781048404279 has 2 divisors, whose sum is σ = 1781048404280. Its totient is φ = 1781048404278.

The previous prime is 1781048404277. The next prime is 1781048404307. The reversal of 1781048404279 is 9724048401871.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1781048404279 - 2¹ = 1781048404277 is a prime.

Together with 1781048404277, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1781048404277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 890524202139 + 890524202140.

It is an arithmetic number, because the mean of its divisors is an integer number (890524202140).

Almost surely, 2^{1781048404279} is an apocalyptic number.

1781048404279 is a deficient number, since it is larger than the sum of its proper divisors (1).

1781048404279 is an equidigital number, since it uses as much as digits as its factorization.

1781048404279 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3612672, while the sum is 55.

The spelling of 1781048404279 in words is "one trillion, seven hundred eighty-one billion, forty-eight million, four hundred four thousand, two hundred seventy-nine".