612221646 has 24 divisors (see below), whose sum is σ = 1300709880. Its totient is φ = 192068992.

The previous prime is 612221641. The next prime is 612221651. The reversal of 612221646 is 646122216.

It is an interprime number because it is at equal distance from previous prime (612221641) and next prime (612221651).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (612221641) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 174801 + ... + 178268.

It is an arithmetic number, because the mean of its divisors is an integer number (54196245).

Almost surely, 2^612221646 is an apocalyptic number.

612221646 is an abundant number, since it is smaller than the sum of its proper divisors (688488234).

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

612221646 is a wasteful number, since it uses less digits than its factorization.

612221646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353108 (or 353091 counting only the distinct ones).

The product of its digits is 6912, while the sum is 30.

The square root of 612221646 is about 24743.1131024372. The cubic root of 612221646 is about 849.1209579036.

The spelling of 612221646 in words is "six hundred twelve million, two hundred twenty-one thousand, six hundred forty-six".