618931450490 has 16 divisors (see below), whose sum is σ = 1152493046280. Its totient is φ = 239035594560.

The previous prime is 618931450471. The next prime is 618931450493. The reversal of 618931450490 is 94054139816.

It can be written as a sum of positive squares in 4 ways, for example, as 497965914889 + 120965535601 = 705667^2 + 347801^2 .

It is a super-2 number, since 2×618931450490² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (618931450493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1067122901 + ... + 1067123480.

Almost surely, 2^618931450490 is an apocalyptic number.

618931450490 is a deficient number, since it is larger than the sum of its proper divisors (533561595790).

618931450490 is a wasteful number, since it uses less digits than its factorization.

618931450490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2134246417.

The product of its (nonzero) digits is 933120, while the sum is 50.

The spelling of 618931450490 in words is "six hundred eighteen billion, nine hundred thirty-one million, four hundred fifty thousand, four hundred ninety".