1612216144 has 80 divisors (see below), whose sum is σ = 3909142656. Its totient is φ = 625766400.

The previous prime is 1612216129. The next prime is 1612216147. The reversal of 1612216144 is 4416122161.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1612216147) 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, 343864 + ... + 348520.

Almost surely, 2^1612216144 is an apocalyptic number.

1612216144 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1612216144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1954571328).

1612216144 is an abundant number, since it is smaller than the sum of its proper divisors (2296926512).

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

1612216144 is a wasteful number, since it uses less digits than its factorization.

1612216144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4964 (or 4958 counting only the distinct ones).

The product of its digits is 2304, while the sum is 28.

The square root of 1612216144 is about 40152.4114344332. The cubic root of 1612216144 is about 1172.5762366494.

The spelling of 1612216144 in words is "one billion, six hundred twelve million, two hundred sixteen thousand, one hundred forty-four".