618455810171 has 4 divisors (see below), whose sum is σ = 623928870552. Its totient is φ = 612982749792.

The previous prime is 618455810087. The next prime is 618455810207. The reversal of 618455810171 is 171018554816.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-618455810171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (618455810471) 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, 2736530021 + ... + 2736530246.

It is an arithmetic number, because the mean of its divisors is an integer number (155982217638).

Almost surely, 2^618455810171 is an apocalyptic number.

618455810171 is a deficient number, since it is larger than the sum of its proper divisors (5473060381).

618455810171 is a wasteful number, since it uses less digits than its factorization.

618455810171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5473060380.

The product of its (nonzero) digits is 268800, while the sum is 47.

The spelling of 618455810171 in words is "six hundred eighteen billion, four hundred fifty-five million, eight hundred ten thousand, one hundred seventy-one".