618889481 has 8 divisors (see below), whose sum is σ = 707524224. Its totient is φ = 530310240.

The previous prime is 618889459. The next prime is 618889501. The reversal of 618889481 is 184988816.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 618889481 - 2¹⁴ = 618873097 is a prime.

It is a super-2 number, since 2×618889481² = 766048379384898722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (618889441) 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 7 ways as a sum of consecutive naturals, for example, 13676 + ... + 37746.

It is an arithmetic number, because the mean of its divisors is an integer number (88440528).

Almost surely, 2^618889481 is an apocalyptic number.

It is an amenable number.

618889481 is a deficient number, since it is larger than the sum of its proper divisors (88634743).

618889481 is a wasteful number, since it uses less digits than its factorization.

618889481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27751.

The product of its digits is 884736, while the sum is 53.

The square root of 618889481 is about 24877.4894432698. The cubic root of 618889481 is about 852.1924856415.

The spelling of 618889481 in words is "six hundred eighteen million, eight hundred eighty-nine thousand, four hundred eighty-one".