1217765679379 has 8 divisors (see below), whose sum is σ = 1219471112880. Its totient is φ = 1216061046816.

The previous prime is 1217765679371. The next prime is 1217765679407. The reversal of 1217765679379 is 9739765677121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1217765679379 - 2³ = 1217765679371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1217765679371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2875737 + ... + 3271909.

It is an arithmetic number, because the mean of its divisors is an integer number (152433889110).

Almost surely, 2^{1217765679379} is an apocalyptic number.

1217765679379 is a deficient number, since it is larger than the sum of its proper divisors (1705433501).

1217765679379 is an equidigital number, since it uses as much as digits as its factorization.

1217765679379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400469.

The product of its digits is 210039480, while the sum is 70.

The spelling of 1217765679379 in words is "one trillion, two hundred seventeen billion, seven hundred sixty-five million, six hundred seventy-nine thousand, three hundred seventy-nine".