618873165081 has 12 divisors (see below), whose sum is σ = 915731025300. Its totient is φ = 402519131520.

The previous prime is 618873165067. The next prime is 618873165089. The reversal of 618873165081 is 180561378816.

618873165081 is a `hidden beast` number, since 61 + 8 + 8 + 73 + 1 + 6 + 508 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 351066915081 + 267806250000 = 592509^2 + 517500^2 .

It is not a de Polignac number, because 618873165081 - 2¹⁵ = 618873132313 is a prime.

It is a super-2 number, since 2×618873165081² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (618873165089) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 838581156 + ... + 838581893.

It is an arithmetic number, because the mean of its divisors is an integer number (76310918775).

Almost surely, 2^618873165081 is an apocalyptic number.

It is an amenable number.

618873165081 is a deficient number, since it is larger than the sum of its proper divisors (296857860219).

618873165081 is a wasteful number, since it uses less digits than its factorization.

618873165081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1677163096 (or 1677163093 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 54.

The spelling of 618873165081 in words is "six hundred eighteen billion, eight hundred seventy-three million, one hundred sixty-five thousand, eighty-one".