618882985 has 24 divisors (see below), whose sum is σ = 867359880. Its totient is φ = 422682624.

The previous prime is 618882967. The next prime is 618883043. The reversal of 618882985 is 589288816.

It can be written as a sum of positive squares in 4 ways, for example, as 375429376 + 243453609 = 19376^2 + 15603^2 .

It is not a de Polignac number, because 618882985 - 2⁷ = 618882857 is a prime.

It is a super-2 number, since 2×618882985² = 766032298245020450, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 58051 + ... + 67879.

It is an arithmetic number, because the mean of its divisors is an integer number (36139995).

Almost surely, 2^618882985 is an apocalyptic number.

It is an amenable number.

618882985 is a deficient number, since it is larger than the sum of its proper divisors (248476895).

618882985 is a wasteful number, since it uses less digits than its factorization.

618882985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10105 (or 10098 counting only the distinct ones).

The product of its digits is 2211840, while the sum is 55.

The square root of 618882985 is about 24877.3588831291. The cubic root of 618882985 is about 852.1895040312.

The spelling of 618882985 in words is "six hundred eighteen million, eight hundred eighty-two thousand, nine hundred eighty-five".