1640607576680 has 64 divisors (see below), whose sum is σ = 3910941066240. Its totient is φ = 617255744512.

The previous prime is 1640607576677. The next prime is 1640607576709. The reversal of 1640607576680 is 866757060461.

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, 342089 + ... + 1843431.

It is an arithmetic number, because the mean of its divisors is an integer number (61108454160).

Almost surely, 2^{1640607576680} is an apocalyptic number.

1640607576680 is a gapful number since it is divisible by the number (10) 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 1640607576680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1955470533120).

1640607576680 is an abundant number, since it is smaller than the sum of its proper divisors (2270333489560).

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

1640607576680 is a wasteful number, since it uses less digits than its factorization.

1640607576680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1502978 (or 1502974 counting only the distinct ones).

The product of its (nonzero) digits is 10160640, while the sum is 56.

The spelling of 1640607576680 in words is "one trillion, six hundred forty billion, six hundred seven million, five hundred seventy-six thousand, six hundred eighty".