3729606656 has 48 divisors (see below), whose sum is σ = 7639451820. Its totient is φ = 1819279360.

The previous prime is 3729606649. The next prime is 3729606689. The reversal of 3729606656 is 6566069273.

It can be written as a sum of positive squares in 2 ways, for example, as 2572518400 + 1157088256 = 50720^2 + 34016^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61760 + ... + 106176.

Almost surely, 2^3729606656 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 3729606656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3819725910).

3729606656 is an abundant number, since it is smaller than the sum of its proper divisors (3909845164).

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

3729606656 is an equidigital number, since it uses as much as digits as its factorization.

3729606656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44480 (or 44460 counting only the distinct ones).

The product of its (nonzero) digits is 2449440, while the sum is 50.

The square root of 3729606656 is about 61070.5056144126. The cubic root of 3729606656 is about 1550.7948273130.

The spelling of 3729606656 in words is "three billion, seven hundred twenty-nine million, six hundred six thousand, six hundred fifty-six".