158417238420 has 144 divisors (see below), whose sum is σ = 550023626880. Its totient is φ = 36154015488.

The previous prime is 158417238367. The next prime is 158417238431. The reversal of 158417238420 is 24832714851.

158417238420 is a `hidden beast` number, since 1 + 5 + 84 + 172 + 384 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 726511 + ... + 919049.

It is an arithmetic number, because the mean of its divisors is an integer number (3819608520).

Almost surely, 2^158417238420 is an apocalyptic number.

158417238420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 158417238420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (275011813440).

158417238420 is an abundant number, since it is smaller than the sum of its proper divisors (391606388460).

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

158417238420 is a wasteful number, since it uses less digits than its factorization.

158417238420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193214 (or 193209 counting only the distinct ones).

The product of its (nonzero) digits is 430080, while the sum is 45.

The spelling of 158417238420 in words is "one hundred fifty-eight billion, four hundred seventeen million, two hundred thirty-eight thousand, four hundred twenty".