3631606907920 has 80 divisors (see below), whose sum is σ = 9410696605440. Its totient is φ = 1295235643392.

The previous prime is 3631606907909. The next prime is 3631606907921. The reversal of 3631606907920 is 297096061363.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (3631606907921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70245192 + ... + 70296871.

It is an arithmetic number, because the mean of its divisors is an integer number (117633707568).

Almost surely, 2^{3631606907920} is an apocalyptic number.

It is an amenable number.

3631606907920 is an abundant number, since it is smaller than the sum of its proper divisors (5779089697520).

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

3631606907920 is a wasteful number, since it uses less digits than its factorization.

3631606907920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140542112 (or 140542106 counting only the distinct ones).

The product of its (nonzero) digits is 2204496, while the sum is 52.

The spelling of 3631606907920 in words is "three trillion, six hundred thirty-one billion, six hundred six million, nine hundred seven thousand, nine hundred twenty".