192158540820 has 72 divisors (see below), whose sum is σ = 602980265160. Its totient is φ = 49475301120.

The previous prime is 192158540813. The next prime is 192158540863. The reversal of 192158540820 is 28045851291.

192158540820 is a `hidden beast` number, since 1 + 9 + 2 + 1 + 585 + 40 + 8 + 20 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 80893598724 + 111264942096 = 284418^2 + 333564^2 .

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

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18400771 + ... + 18411210.

It is an arithmetic number, because the mean of its divisors is an integer number (8374725905).

Almost surely, 2^192158540820 is an apocalyptic number.

192158540820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

192158540820 is an abundant number, since it is smaller than the sum of its proper divisors (410821724340).

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

192158540820 is a wasteful number, since it uses less digits than its factorization.

192158540820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36812025 (or 36812020 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 45.

The spelling of 192158540820 in words is "one hundred ninety-two billion, one hundred fifty-eight million, five hundred forty thousand, eight hundred twenty".