1606921310736 has 135 divisors (see below), whose sum is σ = 5231722731183. Its totient is φ = 459089951040.

The previous prime is 1606921310669. The next prime is 1606921310747. The reversal of 1606921310736 is 6370131296061.

It is a happy number.

The square root of 1606921310736 is 1267644.

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

1606921310736 is a `hidden beast` number, since 1 + 606 + 9 + 2 + 1 + 3 + 1 + 0 + 7 + 36 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 1606921310691 and 1606921310700.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 106474551 + ... + 106489641.

Almost surely, 2^{1606921310736} is an apocalyptic number.

1606921310736 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

1606921310736 is the 1267644-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1606921310736

1606921310736 is an abundant number, since it is smaller than the sum of its proper divisors (3624801420447).

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

1606921310736 is an frugal number, since it uses more digits than its factorization.

1606921310736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30210 (or 15103 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 45.

The spelling of 1606921310736 in words is "one trillion, six hundred six billion, nine hundred twenty-one million, three hundred ten thousand, seven hundred thirty-six".