3631633120644 has 48 divisors (see below), whose sum is σ = 8506422378048. Its totient is φ = 1205888237568.

The previous prime is 3631633120607. The next prime is 3631633120697. The reversal of 3631633120644 is 4460213361363.

It is a junction number, because it is equal to n+sod(n) for n = 3631633120596 and 3631633120605.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10758724 + ... + 11091140.

It is an arithmetic number, because the mean of its divisors is an integer number (177217132876).

Almost surely, 2^{3631633120644} is an apocalyptic number.

It is an amenable number.

3631633120644 is an abundant number, since it is smaller than the sum of its proper divisors (4874789257404).

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

3631633120644 is a wasteful number, since it uses less digits than its factorization.

3631633120644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335924 (or 335922 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 42.

The spelling of 3631633120644 in words is "three trillion, six hundred thirty-one billion, six hundred thirty-three million, one hundred twenty thousand, six hundred forty-four".