505552780305 has 24 divisors (see below), whose sum is σ = 876392899200. Its totient is φ = 269596945440.

The previous prime is 505552780303. The next prime is 505552780319. The reversal of 505552780305 is 503087255505.

It is not a de Polignac number, because 505552780305 - 2¹ = 505552780303 is a prime.

It is a super-2 number, since 2×505552780305² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (505552780303) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 254281 + ... + 1037190.

It is an arithmetic number, because the mean of its divisors is an integer number (36516370800).

Almost surely, 2^505552780305 is an apocalyptic number.

It is an amenable number.

505552780305 is a deficient number, since it is larger than the sum of its proper divisors (370840118895).

505552780305 is a wasteful number, since it uses less digits than its factorization.

505552780305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1300181 (or 1300178 counting only the distinct ones).

The product of its (nonzero) digits is 1050000, while the sum is 45.

The spelling of 505552780305 in words is "five hundred five billion, five hundred fifty-two million, seven hundred eighty thousand, three hundred five".