1640217382620 has 96 divisors (see below), whose sum is σ = 4609775799552. Its totient is φ = 435756976128.

The previous prime is 1640217382567. The next prime is 1640217382631. The reversal of 1640217382620 is 262837120461.

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 31 ways as a sum of consecutive naturals, for example, 159657804 + ... + 159668076.

It is an arithmetic number, because the mean of its divisors is an integer number (48018497912).

Almost surely, 2^{1640217382620} is an apocalyptic number.

1640217382620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1640217382620 is an abundant number, since it is smaller than the sum of its proper divisors (2969558416932).

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

1640217382620 is a wasteful number, since it uses less digits than its factorization.

1640217382620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19971 (or 19969 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 42.

The spelling of 1640217382620 in words is "one trillion, six hundred forty billion, two hundred seventeen million, three hundred eighty-two thousand, six hundred twenty".