1636240331964 has 288 divisors, whose sum is σ = 4779130325760. Its totient is φ = 432842876928.

The previous prime is 1636240331963. The next prime is 1636240331987. The reversal of 1636240331964 is 4691330426361.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1636240331963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 742731687 + ... + 742733889.

It is an arithmetic number, because the mean of its divisors is an integer number (16594202520).

Almost surely, 2^{1636240331964} is an apocalyptic number.

1636240331964 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1636240331964, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2389565162880).

1636240331964 is an abundant number, since it is smaller than the sum of its proper divisors (3142889993796).

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

1636240331964 is a wasteful number, since it uses less digits than its factorization.

1636240331964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3417 (or 3408 counting only the distinct ones).

The product of its (nonzero) digits is 1679616, while the sum is 48.

The spelling of 1636240331964 in words is "one trillion, six hundred thirty-six billion, two hundred forty million, three hundred thirty-one thousand, nine hundred sixty-four".