3631642232645 has 72 divisors (see below), whose sum is σ = 5559160865544. Its totient is φ = 2262960279552.

The previous prime is 3631642232641. The next prime is 3631642232677. The reversal of 3631642232645 is 5462322461363.

It can be written as a sum of positive squares in 12 ways, for example, as 875620576516 + 2756021656129 = 935746^2 + 1660127^2 .

It is not a de Polignac number, because 3631642232645 - 2² = 3631642232641 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 3631642232645.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3631642232641) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 2984369 + ... + 4021161.

It is an arithmetic number, because the mean of its divisors is an integer number (77210567577).

Almost surely, 2^{3631642232645} is an apocalyptic number.

3631642232645 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3631642232645 is a deficient number, since it is larger than the sum of its proper divisors (1927518632899).

3631642232645 is a wasteful number, since it uses less digits than its factorization.

3631642232645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1036887 (or 1036851 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 47.

The spelling of 3631642232645 in words is "three trillion, six hundred thirty-one billion, six hundred forty-two million, two hundred thirty-two thousand, six hundred forty-five".