1216770970779 has 48 divisors (see below), whose sum is σ = 2290392441792. Its totient is φ = 604059531264.

The previous prime is 1216770970757. The next prime is 1216770970817. The reversal of 1216770970779 is 9770790776121.

It is not a de Polignac number, because 1216770970779 - 2⁸ = 1216770970523 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (1216770970729) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 43682514 + ... + 43710359.

It is an arithmetic number, because the mean of its divisors is an integer number (47716509204).

Almost surely, 2^{1216770970779} is an apocalyptic number.

1216770970779 is a deficient number, since it is larger than the sum of its proper divisors (1073621471013).

1216770970779 is a wasteful number, since it uses less digits than its factorization.

1216770970779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87392916 (or 87392913 counting only the distinct ones).

The product of its (nonzero) digits is 16336404, while the sum is 63.

The spelling of 1216770970779 in words is "one trillion, two hundred sixteen billion, seven hundred seventy million, nine hundred seventy thousand, seven hundred seventy-nine".