158136205500 has 1536 divisors, whose sum is σ = 669247488000. Its totient is φ = 32006016000.

The previous prime is 158136205483. The next prime is 158136205519. The reversal of 158136205500 is 5502631851.

It is a happy number.

158136205500 is a `hidden beast` number, since 1 + 5 + 81 + 3 + 6 + 20 + 550 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 511 ways as a sum of consecutive naturals, for example, 2227270465 + ... + 2227270535.

It is an arithmetic number, because the mean of its divisors is an integer number (435708000).

Almost surely, 2^158136205500 is an apocalyptic number.

158136205500 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 158136205500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (334623744000).

158136205500 is an abundant number, since it is smaller than the sum of its proper divisors (511111282500).

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

158136205500 is a wasteful number, since it uses less digits than its factorization.

158136205500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170 (or 138 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 36.

The spelling of 158136205500 in words is "one hundred fifty-eight billion, one hundred thirty-six million, two hundred five thousand, five hundred".