1639038779004 has 24 divisors (see below), whose sum is σ = 4172098710528. Its totient is φ = 496678417840.

The previous prime is 1639038779003. The next prime is 1639038779009. The reversal of 1639038779004 is 4009778309361.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1639038779003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6208480092 + ... + 6208480355.

It is an arithmetic number, because the mean of its divisors is an integer number (173837446272).

Almost surely, 2^{1639038779004} is an apocalyptic number.

It is an amenable number.

1639038779004 is an abundant number, since it is smaller than the sum of its proper divisors (2533059931524).

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

1639038779004 is a wasteful number, since it uses less digits than its factorization.

1639038779004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12416960465 (or 12416960463 counting only the distinct ones).

The product of its (nonzero) digits is 6858432, while the sum is 57.

The spelling of 1639038779004 in words is "one trillion, six hundred thirty-nine billion, thirty-eight million, seven hundred seventy-nine thousand, four".