205150340520 has 128 divisors (see below), whose sum is σ = 705893760000. Its totient is φ = 52942014720.

The previous prime is 205150340509. The next prime is 205150340569. The reversal of 205150340520 is 25043051502.

It is a happy number.

205150340520 is a `hidden beast` number, since 2 + 0 + 51 + 50 + 3 + 40 + 520 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3030295 + ... + 3097254.

It is an arithmetic number, because the mean of its divisors is an integer number (5514795000).

Almost surely, 2^205150340520 is an apocalyptic number.

205150340520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

205150340520 is an abundant number, since it is smaller than the sum of its proper divisors (500743419480).

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

205150340520 is a wasteful number, since it uses less digits than its factorization.

205150340520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6127600 (or 6127590 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The spelling of 205150340520 in words is "two hundred five billion, one hundred fifty million, three hundred forty thousand, five hundred twenty".