1639305540856 has 32 divisors (see below), whose sum is σ = 3077369871840. Its totient is φ = 818673942528.

The previous prime is 1639305540841. The next prime is 1639305540889. The reversal of 1639305540856 is 6580455039361.

It is a junction number, because it is equal to n+sod(n) for n = 1639305540797 and 1639305540806.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41027320 + ... + 41067256.

It is an arithmetic number, because the mean of its divisors is an integer number (96167808495).

Almost surely, 2^{1639305540856} is an apocalyptic number.

It is an amenable number.

1639305540856 is a deficient number, since it is larger than the sum of its proper divisors (1438064330984).

1639305540856 is a wasteful number, since it uses less digits than its factorization.

1639305540856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45943 (or 45939 counting only the distinct ones).

The product of its (nonzero) digits is 11664000, while the sum is 55.

The spelling of 1639305540856 in words is "one trillion, six hundred thirty-nine billion, three hundred five million, five hundred forty thousand, eight hundred fifty-six".