612218144 has 24 divisors (see below), whose sum is σ = 1276205868. Its totient is φ = 288102400.

The previous prime is 612218141. The next prime is 612218147. The reversal of 612218144 is 441812216.

It is an interprime number because it is at equal distance from previous prime (612218141) and next prime (612218147).

It can be written as a sum of positive squares in 2 ways, for example, as 612067600 + 150544 = 24740^2 + 388^2 .

It is a super-2 number, since 2×612218144² = 749622111685609472, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (612218141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 562157 + ... + 563244.

Almost surely, 2^612218144 is an apocalyptic number.

It is an amenable number.

612218144 is an abundant number, since it is smaller than the sum of its proper divisors (663987724).

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

612218144 is a wasteful number, since it uses less digits than its factorization.

612218144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1125428 (or 1125420 counting only the distinct ones).

The product of its digits is 3072, while the sum is 29.

The square root of 612218144 is about 24743.0423351697. The cubic root of 612218144 is about 849.1193388672.

The spelling of 612218144 in words is "six hundred twelve million, two hundred eighteen thousand, one hundred forty-four".