3615064640 has 224 divisors, whose sum is σ = 9972080640. Its totient is φ = 1234483200.

The previous prime is 3615064561. The next prime is 3615064703. The reversal of 3615064640 is 464605163.

It is a self number, because there is not a number n which added to its sum of digits gives 3615064640.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12773939 + ... + 12774221.

Almost surely, 2^3615064640 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 3615064640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4986040320).

3615064640 is an abundant number, since it is smaller than the sum of its proper divisors (6357016000).

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

3615064640 is a wasteful number, since it uses less digits than its factorization.

3615064640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 521 (or 511 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 35.

The square root of 3615064640 is about 60125.4076077660. The cubic root of 3615064640 is about 1534.7537000440.

The spelling of 3615064640 in words is "three billion, six hundred fifteen million, sixty-four thousand, six hundred forty".