15776720448064 has 21 divisors (see below), whose sum is σ = 31306992694627. Its totient is φ = 7888344336064.

The previous prime is 15776720448043. The next prime is 15776720448101. The reversal of 15776720448064 is 46084402767751.

The square root of 15776720448064 is 3971992.

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

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 15776720447993 and 15776720448011.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 31527687 + ... + 32024185.

Almost surely, 2^{15776720448064} is an apocalyptic number.

15776720448064 is the 3971992-nd square number.

It is an amenable number.

15776720448064 is a deficient number, since it is larger than the sum of its proper divisors (15530272246563).

15776720448064 is an frugal number, since it uses more digits than its factorization.

15776720448064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 993010 (or 496501 counting only the distinct ones).

The product of its (nonzero) digits is 63221760, while the sum is 61.

It can be divided in two parts, 15776720 and 448064, that added together give a square (16224784 = 4028²).

The spelling of 15776720448064 in words is "fifteen trillion, seven hundred seventy-six billion, seven hundred twenty million, four hundred forty-eight thousand, sixty-four".