158220636520 has 16 divisors (see below), whose sum is σ = 355996432260. Its totient is φ = 63288254592.

The previous prime is 158220636449. The next prime is 158220636521. The reversal of 158220636520 is 25636022851.

It is a happy number.

158220636520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 153756525924 + 4464110596 = 392118^2 + 66814^2 .

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 3955515913 = 158220636520 / (1 + 5 + 8 + 2 + 2 + 0 + 6 + 3 + 6 + 5 + 2 + 0).

It is not an unprimeable number, because it can be changed into a prime (158220636521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1977757917 + ... + 1977757996.

Almost surely, 2^158220636520 is an apocalyptic number.

158220636520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

158220636520 is an abundant number, since it is smaller than the sum of its proper divisors (197775795740).

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

158220636520 is a wasteful number, since it uses less digits than its factorization.

158220636520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3955515924 (or 3955515920 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 40.

The spelling of 158220636520 in words is "one hundred fifty-eight billion, two hundred twenty million, six hundred thirty-six thousand, five hundred twenty".