1639958883849 has 288 divisors, whose sum is σ = 3000571112448. Its totient is φ = 853991424000.

The previous prime is 1639958883821. The next prime is 1639958883869. The reversal of 1639958883849 is 9483888599361.

It is not a de Polignac number, because 1639958883849 - 2⁵ = 1639958883817 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1639958883809) by changing a digit.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 1861473889 + ... + 1861474769.

It is an arithmetic number, because the mean of its divisors is an integer number (10418649696).

Almost surely, 2^{1639958883849} is an apocalyptic number.

It is an amenable number.

1639958883849 is a deficient number, since it is larger than the sum of its proper divisors (1360612228599).

1639958883849 is a wasteful number, since it uses less digits than its factorization.

1639958883849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1089 (or 1073 counting only the distinct ones).

The product of its digits is 3224862720, while the sum is 81.

The spelling of 1639958883849 in words is "one trillion, six hundred thirty-nine billion, nine hundred fifty-eight million, eight hundred eighty-three thousand, eight hundred forty-nine".