1640880493280 has 192 divisors, whose sum is σ = 4563901988352. Its totient is φ = 545724241920.

The previous prime is 1640880493249. The next prime is 1640880493309. The reversal of 1640880493280 is 823940880461.

It is a super-2 number, since 2×1640880493280² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13656827 + ... + 13776453.

It is an arithmetic number, because the mean of its divisors is an integer number (23770322856).

Almost surely, 2^{1640880493280} is an apocalyptic number.

1640880493280 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 1640880493280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2281950994176).

1640880493280 is an abundant number, since it is smaller than the sum of its proper divisors (2923021495072).

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

1640880493280 is a wasteful number, since it uses less digits than its factorization.

1640880493280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120017 (or 120009 counting only the distinct ones).

The product of its (nonzero) digits is 2654208, while the sum is 53.

The spelling of 1640880493280 in words is "one trillion, six hundred forty billion, eight hundred eighty million, four hundred ninety-three thousand, two hundred eighty".