158780218420 has 24 divisors (see below), whose sum is σ = 333792843048. Its totient is φ = 63444585600.

The previous prime is 158780218403. The next prime is 158780218423. The reversal of 158780218420 is 24812087851.

It can be written as a sum of positive squares in 4 ways, for example, as 61962162084 + 96818056336 = 248922^2 + 311156^2 .

It is a super-2 number, since 2×158780218420² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158780218423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4199571 + ... + 4237210.

It is an arithmetic number, because the mean of its divisors is an integer number (13908035127).

Almost surely, 2^158780218420 is an apocalyptic number.

158780218420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

158780218420 is an abundant number, since it is smaller than the sum of its proper divisors (175012624628).

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

158780218420 is a wasteful number, since it uses less digits than its factorization.

158780218420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8437731 (or 8437729 counting only the distinct ones).

The product of its (nonzero) digits is 286720, while the sum is 46.

The spelling of 158780218420 in words is "one hundred fifty-eight billion, seven hundred eighty million, two hundred eighteen thousand, four hundred twenty".