1640517800380 has 24 divisors (see below), whose sum is σ = 3448971394848. Its totient is φ = 655467307968.

The previous prime is 1640517800351. The next prime is 1640517800393. The reversal of 1640517800380 is 830087150461.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46220079 + ... + 46255558.

It is an arithmetic number, because the mean of its divisors is an integer number (143707141452).

Almost surely, 2^{1640517800380} is an apocalyptic number.

1640517800380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1640517800380 is an abundant number, since it is smaller than the sum of its proper divisors (1808453594468).

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

1640517800380 is a wasteful number, since it uses less digits than its factorization.

1640517800380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92476533 (or 92476531 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 43.

The spelling of 1640517800380 in words is "one trillion, six hundred forty billion, five hundred seventeen million, eight hundred thousand, three hundred eighty".