1639719670368 has 48 divisors (see below), whose sum is σ = 4635361379376. Its totient is φ = 504529128960.

The previous prime is 1639719670333. The next prime is 1639719670481. The reversal of 1639719670368 is 8630769179361.

It is a tau number, because it is divible by the number of its divisors (48).

It is a junction number, because it is equal to n+sod(n) for n = 1639719670299 and 1639719670308.

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, 656937723 + ... + 656940218.

It is an arithmetic number, because the mean of its divisors is an integer number (96570028737).

Almost surely, 2^{1639719670368} is an apocalyptic number.

It is an amenable number.

1639719670368 is an abundant number, since it is smaller than the sum of its proper divisors (2995641709008).

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

1639719670368 is a wasteful number, since it uses less digits than its factorization.

1639719670368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1313877967 (or 1313877959 counting only the distinct ones).

The product of its (nonzero) digits is 61725888, while the sum is 66.

The spelling of 1639719670368 in words is "one trillion, six hundred thirty-nine billion, seven hundred nineteen million, six hundred seventy thousand, three hundred sixty-eight".