1662939371904 has 64 divisors (see below), whose sum is σ = 4418218405440. Its totient is φ = 554183154176.

The previous prime is 1662939371887. The next prime is 1662939371939. The reversal of 1662939371904 is 4091739392661.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1139119 + ... + 2150225.

It is an arithmetic number, because the mean of its divisors is an integer number (69034662585).

Almost surely, 2^{1662939371904} is an apocalyptic number.

It is an amenable number.

1662939371904 is an abundant number, since it is smaller than the sum of its proper divisors (2755279033536).

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

1662939371904 is a wasteful number, since it uses less digits than its factorization.

1662939371904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1015407 (or 1015395 counting only the distinct ones).

The product of its (nonzero) digits is 13226976, while the sum is 60.

The spelling of 1662939371904 in words is "one trillion, six hundred sixty-two billion, nine hundred thirty-nine million, three hundred seventy-one thousand, nine hundred four".