1640631544600 has 48 divisors (see below), whose sum is σ = 3837870063720. Its totient is φ = 652226515200.

The previous prime is 1640631544583. The next prime is 1640631544619. The reversal of 1640631544600 is 64451360461.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 25130461 + ... + 25195660.

Almost surely, 2^{1640631544600} is an apocalyptic number.

1640631544600 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1640631544600 is an abundant number, since it is smaller than the sum of its proper divisors (2197238519120).

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

1640631544600 is a wasteful number, since it uses less digits than its factorization.

1640631544600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50326300 (or 50326291 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 40.

The spelling of 1640631544600 in words is "one trillion, six hundred forty billion, six hundred thirty-one million, five hundred forty-four thousand, six hundred".