605155642020 has 72 divisors (see below), whose sum is σ = 1853813477880. Its totient is φ = 159777062400.

The previous prime is 605155642001. The next prime is 605155642027. The reversal of 605155642020 is 20246551506.

605155642020 is a `hidden beast` number, since 6 + 0 + 5 + 1 + 5 + 5 + 642 + 0 + 2 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 311035982436 + 294119659584 = 557706^2 + 542328^2 .

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

It is not an unprimeable number, because it can be changed into a prime (605155642027) by changing a digit.

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, 16625265 + ... + 16661624.

It is an arithmetic number, because the mean of its divisors is an integer number (25747409415).

Almost surely, 2^605155642020 is an apocalyptic number.

605155642020 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

605155642020 is an abundant number, since it is smaller than the sum of its proper divisors (1248657835860).

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

605155642020 is a wasteful number, since it uses less digits than its factorization.

605155642020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33287005 (or 33287000 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

The spelling of 605155642020 in words is "six hundred five billion, one hundred fifty-five million, six hundred forty-two thousand, twenty".