1640335447480 has 64 divisors (see below), whose sum is σ = 3974092956000. Its totient is φ = 607071289344.

The previous prime is 1640335447469. The next prime is 1640335447529. The reversal of 1640335447480 is 847445330461.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20402745 + ... + 20482984.

Almost surely, 2^{1640335447480} is an apocalyptic number.

1640335447480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1640335447480 is an abundant number, since it is smaller than the sum of its proper divisors (2333757508520).

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

1640335447480 is a wasteful number, since it uses less digits than its factorization.

1640335447480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40885816 (or 40885812 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 49.

The spelling of 1640335447480 in words is "one trillion, six hundred forty billion, three hundred thirty-five million, four hundred forty-seven thousand, four hundred eighty".