218390355057 has 32 divisors (see below), whose sum is σ = 335549491200. Its totient is φ = 123759192960.

The previous prime is 218390355049. The next prime is 218390355089. The reversal of 218390355057 is 750553093812.

It is not a de Polignac number, because 218390355057 - 2³ = 218390355049 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 218390354997 and 218390355015.

It is not an unprimeable number, because it can be changed into a prime (218390355097) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4219069 + ... + 4270517.

It is an arithmetic number, because the mean of its divisors is an integer number (10485921600).

Almost surely, 2^218390355057 is an apocalyptic number.

It is an amenable number.

218390355057 is a deficient number, since it is larger than the sum of its proper divisors (117159136143).

218390355057 is a wasteful number, since it uses less digits than its factorization.

218390355057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53133.

The product of its (nonzero) digits is 1134000, while the sum is 48.

The spelling of 218390355057 in words is "two hundred eighteen billion, three hundred ninety million, three hundred fifty-five thousand, fifty-seven".