618121851 has 16 divisors (see below), whose sum is σ = 869735040. Its totient is φ = 389404800.

The previous prime is 618121843. The next prime is 618121859. The reversal of 618121851 is 158121816.

It is an interprime number because it is at equal distance from previous prime (618121843) and next prime (618121859).

It is not a de Polignac number, because 618121851 - 2³ = 618121843 is a prime.

It is not an unprimeable number, because it can be changed into a prime (618121859) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9336 + ... + 36378.

It is an arithmetic number, because the mean of its divisors is an integer number (54358440).

Almost surely, 2^618121851 is an apocalyptic number.

618121851 is a deficient number, since it is larger than the sum of its proper divisors (251613189).

618121851 is a wasteful number, since it uses less digits than its factorization.

618121851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27466.

The product of its digits is 3840, while the sum is 33.

The square root of 618121851 is about 24862.0564515488. The cubic root of 618121851 is about 851.8400052784.

The spelling of 618121851 in words is "six hundred eighteen million, one hundred twenty-one thousand, eight hundred fifty-one".