1659263439376 has 135 divisors (see below), whose sum is σ = 3607872496839. Its totient is φ = 738991586304.

The previous prime is 1659263439347. The next prime is 1659263439403. The reversal of 1659263439376 is 6739343629561.

It is a happy number.

The square root of 1659263439376 is 1288124.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 686120648976 + 973142790400 = 828324^2 + 986480^2 .

It is a super-2 number, since 2×1659263439376² (a number of 25 digits) contains 22 as substring.

It is a Duffinian 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 26 ways as a sum of consecutive naturals, for example, 1664255710 + ... + 1664256706.

Almost surely, 2^{1659263439376} is an apocalyptic number.

1659263439376 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

1659263439376 is the 1288124-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1659263439376

1659263439376 is an abundant number, since it is smaller than the sum of its proper divisors (1948609057463).

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

1659263439376 is an frugal number, since it uses more digits than its factorization.

1659263439376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2074 (or 1035 counting only the distinct ones).

The product of its digits is 132269760, while the sum is 64.

Multiplying 1659263439376 by its sum of digits (64), we get a square (106192860120064 = 10304992²).

The spelling of 1659263439376 in words is "one trillion, six hundred fifty-nine billion, two hundred sixty-three million, four hundred thirty-nine thousand, three hundred seventy-six".