505367778979 has 8 divisors (see below), whose sum is σ = 577567778400. Its totient is φ = 433168930176.

The previous prime is 505367778961. The next prime is 505367779027. The reversal of 505367778979 is 979877763505.

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 505367778979 - 2²⁵ = 505334224547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (505367770979) 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, 1099467 + ... + 1489819.

It is an arithmetic number, because the mean of its divisors is an integer number (72195972300).

Almost surely, 2^505367778979 is an apocalyptic number.

505367778979 is a deficient number, since it is larger than the sum of its proper divisors (72199999421).

505367778979 is a wasteful number, since it uses less digits than its factorization.

505367778979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 575309.

The product of its (nonzero) digits is 700131600, while the sum is 73.

The spelling of 505367778979 in words is "five hundred five billion, three hundred sixty-seven million, seven hundred seventy-eight thousand, nine hundred seventy-nine".