618645051 has 6 divisors (see below), whose sum is σ = 893598420. Its totient is φ = 412430028.

The previous prime is 618645029. The next prime is 618645061. The reversal of 618645051 is 150546816.

618645051 is a `hidden beast` number, since 6 + 1 + 8 + 645 + 0 + 5 + 1 = 666.

It is not a de Polignac number, because 618645051 - 2⁹ = 618644539 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 618644997 and 618645015.

It is not an unprimeable number, because it can be changed into a prime (618645061) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 34369161 + ... + 34369178.

It is an arithmetic number, because the mean of its divisors is an integer number (148933070).

Almost surely, 2^618645051 is an apocalyptic number.

618645051 is a deficient number, since it is larger than the sum of its proper divisors (274953369).

618645051 is a wasteful number, since it uses less digits than its factorization.

618645051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68738345 (or 68738342 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The square root of 618645051 is about 24872.5762839317. The cubic root of 618645051 is about 852.0802799114.

The spelling of 618645051 in words is "six hundred eighteen million, six hundred forty-five thousand, fifty-one".