423857578218 has 16 divisors (see below), whose sum is σ = 847748046816. Its totient is φ = 141280377680.

The previous prime is 423857578187. The next prime is 423857578231. The reversal of 423857578218 is 812875758324.

It is a super-2 number, since 2×423857578218² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1201296 + ... + 1513547.

It is an arithmetic number, because the mean of its divisors is an integer number (52984252926).

Almost surely, 2^423857578218 is an apocalyptic number.

423857578218 is an abundant number, since it is smaller than the sum of its proper divisors (423890468598).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

423857578218 is a wasteful number, since it uses less digits than its factorization.

423857578218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2740869.

The product of its digits is 30105600, while the sum is 60.

The spelling of 423857578218 in words is "four hundred twenty-three billion, eight hundred fifty-seven million, five hundred seventy-eight thousand, two hundred eighteen".