3612999680 has 144 divisors (see below), whose sum is σ = 8965290600. Its totient is φ = 1396703232.

The previous prime is 3612999673. The next prime is 3612999769. The reversal of 3612999680 is 869992163.

It can be written as a sum of positive squares in 4 ways, for example, as 2917728256 + 695271424 = 54016^2 + 26368^2 .

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, 24248246 + ... + 24248394.

Almost surely, 2^3612999680 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3612999680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4482645300).

3612999680 is an abundant number, since it is smaller than the sum of its proper divisors (5352290920).

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

3612999680 is an frugal number, since it uses more digits than its factorization.

3612999680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225 (or 193 counting only the distinct ones).

The product of its (nonzero) digits is 1259712, while the sum is 53.

The square root of 3612999680 is about 60108.2330467300. The cubic root of 3612999680 is about 1534.4614223179.

The spelling of 3612999680 in words is "three billion, six hundred twelve million, nine hundred ninety-nine thousand, six hundred eighty".