655320012 has 24 divisors (see below), whose sum is σ = 1619026416. Its totient is φ = 205590528.

The previous prime is 655320007. The next prime is 655320023. The reversal of 655320012 is 210023556.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1605973 + ... + 1606380.

It is an arithmetic number, because the mean of its divisors is an integer number (67459434).

Almost surely, 2^655320012 is an apocalyptic number.

It is an amenable number.

655320012 is an abundant number, since it is smaller than the sum of its proper divisors (963706404).

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

655320012 is a wasteful number, since it uses less digits than its factorization.

655320012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3212377 (or 3212375 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 655320012 is about 25599.2189724609. The cubic root of 655320012 is about 868.5959702629.

Adding to 655320012 its reverse (210023556), we get a palindrome (865343568).

It can be divided in two parts, 6553 and 20012, that added together give a triangular number (26565 = T₂₃₀).

The spelling of 655320012 in words is "six hundred fifty-five million, three hundred twenty thousand, twelve".