1639190867468 has 96 divisors (see below), whose sum is σ = 3787450265088. Its totient is φ = 600974208000.

The previous prime is 1639190867443. The next prime is 1639190867471. The reversal of 1639190867468 is 8647680919361.

It is a Harshad number since it is a multiple of its sum of digits (68).

It is a junction number, because it is equal to n+sod(n) for n = 1639190867398 and 1639190867407.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34340018 + ... + 34387718.

It is an arithmetic number, because the mean of its divisors is an integer number (39452606928).

Almost surely, 2^{1639190867468} 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 1639190867468, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1893725132544).

1639190867468 is an abundant number, since it is smaller than the sum of its proper divisors (2148259397620).

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

1639190867468 is a wasteful number, since it uses less digits than its factorization.

1639190867468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54303 (or 54301 counting only the distinct ones).

The product of its (nonzero) digits is 94058496, while the sum is 68.

The spelling of 1639190867468 in words is "one trillion, six hundred thirty-nine billion, one hundred ninety million, eight hundred sixty-seven thousand, four hundred sixty-eight".