420012915779 has 4 divisors (see below), whose sum is σ = 420121142520. Its totient is φ = 419904689040.

The previous prime is 420012915769. The next prime is 420012915781. The reversal of 420012915779 is 977519210024.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420012915779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420012915719) 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 3 ways as a sum of consecutive naturals, for example, 54107549 + ... + 54115310.

It is an arithmetic number, because the mean of its divisors is an integer number (105030285630).

Almost surely, 2^420012915779 is an apocalyptic number.

420012915779 is a deficient number, since it is larger than the sum of its proper divisors (108226741).

420012915779 is a wasteful number, since it uses less digits than its factorization.

420012915779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108226740.

The product of its (nonzero) digits is 317520, while the sum is 47.

The spelling of 420012915779 in words is "four hundred twenty billion, twelve million, nine hundred fifteen thousand, seven hundred seventy-nine".