618899955 has 16 divisors (see below), whose sum is σ = 991042560. Its totient is φ = 329812448.

The previous prime is 618899951. The next prime is 618899993. The reversal of 618899955 is 559998816.

It is a cyclic number.

It is not a de Polignac number, because 618899955 - 2² = 618899951 is a prime.

It is not an unprimeable number, because it can be changed into a prime (618899951) 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 15 ways as a sum of consecutive naturals, for example, 3166 + ... + 35324.

It is an arithmetic number, because the mean of its divisors is an integer number (61940160).

Almost surely, 2^618899955 is an apocalyptic number.

618899955 is a deficient number, since it is larger than the sum of its proper divisors (372142605).

618899955 is a wasteful number, since it uses less digits than its factorization.

618899955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33450.

The product of its digits is 6998400, while the sum is 60.

The square root of 618899955 is about 24877.6999539748. The cubic root of 618899955 is about 852.1972930769.

The spelling of 618899955 in words is "six hundred eighteen million, eight hundred ninety-nine thousand, nine hundred fifty-five".