158728728492 has 72 divisors (see below), whose sum is σ = 416352179152. Its totient is φ = 52876411200.

The previous prime is 158728728461. The next prime is 158728728539. The reversal of 158728728492 is 294827827851.

158728728492 is a `hidden beast` number, since 1 + 5 + 8 + 72 + 8 + 72 + 8 + 492 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1525242 + ... + 1625982.

Almost surely, 2^158728728492 is an apocalyptic number.

158728728492 is a gapful number since it is divisible by the number (12) 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 158728728492, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (208176089576).

158728728492 is an abundant number, since it is smaller than the sum of its proper divisors (257623450660).

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

158728728492 is a wasteful number, since it uses less digits than its factorization.

158728728492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102381 (or 102367 counting only the distinct ones).

The product of its digits is 36126720, while the sum is 63.

The spelling of 158728728492 in words is "one hundred fifty-eight billion, seven hundred twenty-eight million, seven hundred twenty-eight thousand, four hundred ninety-two".