505000555491 has 32 divisors (see below), whose sum is σ = 696184012800. Its totient is φ = 325436014080.

The previous prime is 505000555483. The next prime is 505000555519. The reversal of 505000555491 is 194555000505.

It is not a de Polignac number, because 505000555491 - 2³ = 505000555483 is a prime.

It is a super-2 number, since 2×505000555491² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (505000555481) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 55265275 + ... + 55274411.

It is an arithmetic number, because the mean of its divisors is an integer number (21755750400).

Almost surely, 2^505000555491 is an apocalyptic number.

505000555491 is a deficient number, since it is larger than the sum of its proper divisors (191183457309).

505000555491 is a wasteful number, since it uses less digits than its factorization.

505000555491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14379.

The product of its (nonzero) digits is 112500, while the sum is 39.

Adding to 505000555491 its reverse (194555000505), we get a palindrome (699555555996).

The spelling of 505000555491 in words is "five hundred five billion, five hundred fifty-five thousand, four hundred ninety-one".