618225518 has 4 divisors (see below), whose sum is σ = 927338280. Its totient is φ = 309112758.

The previous prime is 618225499. The next prime is 618225527. The reversal of 618225518 is 815522816.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×618225518² = 764405582212736648, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 154556378 + ... + 154556381.

It is an arithmetic number, because the mean of its divisors is an integer number (231834570).

Almost surely, 2^618225518 is an apocalyptic number.

618225518 is a deficient number, since it is larger than the sum of its proper divisors (309112762).

618225518 is a wasteful number, since it uses less digits than its factorization.

618225518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309112761.

The product of its digits is 38400, while the sum is 38.

The square root of 618225518 is about 24864.1412077715. The cubic root of 618225518 is about 851.8876241318.

The spelling of 618225518 in words is "six hundred eighteen million, two hundred twenty-five thousand, five hundred eighteen".