612161220 has 48 divisors (see below), whose sum is σ = 1869876288. Its totient is φ = 148402560.

The previous prime is 612161161. The next prime is 612161227. The reversal of 612161220 is 22161216.

612161220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (612161227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 463099 + ... + 464418.

It is an arithmetic number, because the mean of its divisors is an integer number (38955756).

Almost surely, 2^612161220 is an apocalyptic number.

612161220 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

612161220 is an abundant number, since it is smaller than the sum of its proper divisors (1257715068).

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

612161220 is a wasteful number, since it uses less digits than its factorization.

612161220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 927540 (or 927538 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 612161220 is about 24741.8920052610. The cubic root of 612161220 is about 849.0930210327.

The spelling of 612161220 in words is "six hundred twelve million, one hundred sixty-one thousand, two hundred twenty".