618078891 has 8 divisors (see below), whose sum is σ = 824770000. Its totient is φ = 411720192.

The previous prime is 618078871. The next prime is 618078907. The reversal of 618078891 is 198870816.

618078891 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 618078891 - 2⁷ = 618078763 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 618078891.

It is not an unprimeable number, because it can be changed into a prime (618078841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78730 + ... + 86223.

It is an arithmetic number, because the mean of its divisors is an integer number (103096250).

Almost surely, 2^618078891 is an apocalyptic number.

618078891 is a deficient number, since it is larger than the sum of its proper divisors (206691109).

618078891 is a wasteful number, since it uses less digits than its factorization.

618078891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166205.

The product of its (nonzero) digits is 193536, while the sum is 48.

The square root of 618078891 is about 24861.1924693889. The cubic root of 618078891 is about 851.8202702836.

The spelling of 618078891 in words is "six hundred eighteen million, seventy-eight thousand, eight hundred ninety-one".