1639308742480 has 40 divisors (see below), whose sum is σ = 3811446121032. Its totient is φ = 655714328064.

The previous prime is 1639308742447. The next prime is 1639308742507. The reversal of 1639308742480 is 842478039361.

It can be written as a sum of positive squares in 4 ways, for example, as 8855562816 + 1630453179664 = 94104^2 + 1276892^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 10923634 + ... + 11072686.

Almost surely, 2^{1639308742480} is an apocalyptic number.

1639308742480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1639308742480 is an abundant number, since it is smaller than the sum of its proper divisors (2172137378552).

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

1639308742480 is a wasteful number, since it uses less digits than its factorization.

1639308742480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286543 (or 286537 counting only the distinct ones).

The product of its (nonzero) digits is 6967296, while the sum is 55.

The spelling of 1639308742480 in words is "one trillion, six hundred thirty-nine billion, three hundred eight million, seven hundred forty-two thousand, four hundred eighty".