218159405357 has 4 divisors (see below), whose sum is σ = 218194878816. Its totient is φ = 218123931900.

The previous prime is 218159405339. The next prime is 218159405369. The reversal of 218159405357 is 753504951812.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 218159405357 - 2³⁰ = 217085663533 is a prime.

It is a super-2 number, since 2×218159405357² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218159405327) 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, 17727503 + ... + 17739804.

It is an arithmetic number, because the mean of its divisors is an integer number (54548719704).

Almost surely, 2^218159405357 is an apocalyptic number.

It is an amenable number.

218159405357 is a deficient number, since it is larger than the sum of its proper divisors (35473459).

218159405357 is an equidigital number, since it uses as much as digits as its factorization.

218159405357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35473458.

The product of its (nonzero) digits is 1512000, while the sum is 50.

The spelling of 218159405357 in words is "two hundred eighteen billion, one hundred fifty-nine million, four hundred five thousand, three hundred fifty-seven".