16556015747064 has 64 divisors (see below), whose sum is σ = 41936561604000. Its totient is φ = 5446128328704.

The previous prime is 16556015746973. The next prime is 16556015747113. The reversal of 16556015747064 is 46074751065561.

It is a super-2 number, since 2×16556015747064² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16556015746995 and 16556015747013.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9376197 + ... + 11001140.

Almost surely, 2^{16556015747064} is an apocalyptic number.

It is an amenable number.

16556015747064 is an abundant number, since it is smaller than the sum of its proper divisors (25380545856936).

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

16556015747064 is a wasteful number, since it uses less digits than its factorization.

16556015747064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20377792 (or 20377788 counting only the distinct ones).

The product of its (nonzero) digits is 21168000, while the sum is 57.

The spelling of 16556015747064 in words is "sixteen trillion, five hundred fifty-six billion, fifteen million, seven hundred forty-seven thousand, sixty-four".