618974481 has 4 divisors (see below), whose sum is σ = 825299312. Its totient is φ = 412649652.

The previous prime is 618974479. The next prime is 618974491. The reversal of 618974481 is 184479816.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 618974481 - 2¹ = 618974479 is a prime.

It is a super-2 number, since 2×618974481² = 766258816258438722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 618974481.

It is not an unprimeable number, because it can be changed into a prime (618974491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103162411 + ... + 103162416.

It is an arithmetic number, because the mean of its divisors is an integer number (206324828).

Almost surely, 2^618974481 is an apocalyptic number.

It is an amenable number.

618974481 is a deficient number, since it is larger than the sum of its proper divisors (206324831).

618974481 is a wasteful number, since it uses less digits than its factorization.

618974481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206324830.

The product of its digits is 387072, while the sum is 48.

The square root of 618974481 is about 24879.1977563586. The cubic root of 618974481 is about 852.2314980163.

The spelling of 618974481 in words is "six hundred eighteen million, nine hundred seventy-four thousand, four hundred eighty-one".