3640531416 has 48 divisors (see below), whose sum is σ = 9276463560. Its totient is φ = 1190592000.

The previous prime is 3640531337. The next prime is 3640531421. The reversal of 3640531416 is 6141350463.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40416 + ... + 94416.

Almost surely, 2^3640531416 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 3640531416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4638231780).

3640531416 is an abundant number, since it is smaller than the sum of its proper divisors (5635932144).

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

3640531416 is a wasteful number, since it uses less digits than its factorization.

3640531416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54116 (or 54059 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 3640531416 is about 60336.8164224796. The cubic root of 3640531416 is about 1538.3491918571.

Adding to 3640531416 its reverse (6141350463), we get a palindrome (9781881879).

The spelling of 3640531416 in words is "three billion, six hundred forty million, five hundred thirty-one thousand, four hundred sixteen".