618012891 has 24 divisors (see below), whose sum is σ = 912744144. Its totient is φ = 402842880.

The previous prime is 618012851. The next prime is 618012893. The reversal of 618012891 is 198210816.

It is a de Polignac number, because none of the positive numbers 2^k-618012891 is a prime.

It is not an unprimeable number, because it can be changed into a prime (618012893) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 78871 + ... + 86351.

It is an arithmetic number, because the mean of its divisors is an integer number (38031006).

Almost surely, 2^618012891 is an apocalyptic number.

618012891 is a deficient number, since it is larger than the sum of its proper divisors (294731253).

618012891 is a wasteful number, since it uses less digits than its factorization.

618012891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7691 (or 7688 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 36.

The square root of 618012891 is about 24859.8650639942. The cubic root of 618012891 is about 851.7899493759.

The spelling of 618012891 in words is "six hundred eighteen million, twelve thousand, eight hundred ninety-one".