618822358782091 has 4 divisors (see below), whose sum is σ = 618822409417632. Its totient is φ = 618822308146552.

The previous prime is 618822358782071. The next prime is 618822358782137. The reversal of 618822358782091 is 190287853228816.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 618822358782091 - 2⁵ = 618822358782059 is a prime.

It is a super-2 number, since 2×618822358782091² (a number of 30 digits) contains 22 as substring.

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 618822358782091.

It is not an unprimeable number, because it can be changed into a prime (618822358782071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5596590 + ... + 35622556.

It is an arithmetic number, because the mean of its divisors is an integer number (154705602354408).

Almost surely, 2^{618822358782091} is an apocalyptic number.

618822358782091 is a deficient number, since it is larger than the sum of its proper divisors (50635541).

618822358782091 is a wasteful number, since it uses less digits than its factorization.

618822358782091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50635540.

The product of its (nonzero) digits is 185794560, while the sum is 70.

The spelling of 618822358782091 in words is "six hundred eighteen trillion, eight hundred twenty-two billion, three hundred fifty-eight million, seven hundred eighty-two thousand, ninety-one".