1640253028876 has 144 divisors (see below), whose sum is σ = 3754366330176. Its totient is φ = 613248768000.

The previous prime is 1640253028867. The next prime is 1640253028889. The reversal of 1640253028876 is 6788203520461.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8376600 + ... + 8570176.

It is an arithmetic number, because the mean of its divisors is an integer number (26071988404).

Almost surely, 2^{1640253028876} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1640253028876, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1877183165088).

1640253028876 is an abundant number, since it is smaller than the sum of its proper divisors (2114113301300).

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

1640253028876 is a wasteful number, since it uses less digits than its factorization.

1640253028876 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193712 (or 193699 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 52.

The spelling of 1640253028876 in words is "one trillion, six hundred forty billion, two hundred fifty-three million, twenty-eight thousand, eight hundred seventy-six".