3640609680 has 40 divisors (see below), whose sum is σ = 11285890752. Its totient is φ = 970829184.

The previous prime is 3640609673. The next prime is 3640609699. The reversal of 3640609680 is 869060463.

It is a tau number, because it is divible by the number of its divisors (40).

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, 7584364 + ... + 7584843.

Almost surely, 2^3640609680 is an apocalyptic number.

3640609680 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3640609680 is an abundant number, since it is smaller than the sum of its proper divisors (7645281072).

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

3640609680 is a wasteful number, since it uses less digits than its factorization.

3640609680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15169223 (or 15169217 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 42.

The square root of 3640609680 is about 60337.4649782372. The cubic root of 3640609680 is about 1538.3602155681.

The spelling of 3640609680 in words is "three billion, six hundred forty million, six hundred nine thousand, six hundred eighty".