42438472818 has 128 divisors (see below), whose sum is σ = 105281856000. Its totient is φ = 11360047104.

The previous prime is 42438472807. The next prime is 42438472829. The reversal of 42438472818 is 81827483424.

42438472818 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (42438472807) and next prime (42438472829).

It is a super-2 number, since 2×42438472818² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8009146 + ... + 8014442.

It is an arithmetic number, because the mean of its divisors is an integer number (822514500).

Almost surely, 2^42438472818 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42438472818, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52640928000).

42438472818 is an abundant number, since it is smaller than the sum of its proper divisors (62843383182).

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

42438472818 is a wasteful number, since it uses less digits than its factorization.

42438472818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5569 (or 5555 counting only the distinct ones).

The product of its digits is 2752512, while the sum is 51.

The spelling of 42438472818 in words is "forty-two billion, four hundred thirty-eight million, four hundred seventy-two thousand, eight hundred eighteen".