612636489 has 12 divisors (see below), whose sum is σ = 887199300. Its totient is φ = 407372064.

The previous prime is 612636469. The next prime is 612636499. The reversal of 612636489 is 984636216.

612636489 is a `hidden beast` number, since 6 + 1 + 2 + 636 + 4 + 8 + 9 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 339296400 + 273340089 = 18420^2 + 16533^2 .

It is not a de Polignac number, because 612636489 - 2⁹ = 612635977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (612636439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 83994 + ... + 90995.

It is an arithmetic number, because the mean of its divisors is an integer number (73933275).

Almost surely, 2^612636489 is an apocalyptic number.

It is an amenable number.

612636489 is a deficient number, since it is larger than the sum of its proper divisors (274562811).

612636489 is a wasteful number, since it uses less digits than its factorization.

612636489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175384 (or 175381 counting only the distinct ones).

The product of its digits is 373248, while the sum is 45.

The square root of 612636489 is about 24751.4946821399. The cubic root of 612636489 is about 849.3127034669.

The spelling of 612636489 in words is "six hundred twelve million, six hundred thirty-six thousand, four hundred eighty-nine".