16155603664 has 10 divisors (see below), whose sum is σ = 31301482130. Its totient is φ = 8077801824.

The previous prime is 16155603637. The next prime is 16155603677. The reversal of 16155603664 is 46630655161.

It can be written as a sum of positive squares in only one way, i.e., 12374337600 + 3781266064 = 111240^2 + 61492^2 .

It is a super-2 number, since 2×16155603664² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 16155603664.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 504862599 + ... + 504862630.

It is an arithmetic number, because the mean of its divisors is an integer number (3130148213).

Almost surely, 2^16155603664 is an apocalyptic number.

It is an amenable number.

16155603664 is a deficient number, since it is larger than the sum of its proper divisors (15145878466).

16155603664 is a wasteful number, since it uses less digits than its factorization.

16155603664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1009725237 (or 1009725231 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 43.

The spelling of 16155603664 in words is "sixteen billion, one hundred fifty-five million, six hundred three thousand, six hundred sixty-four".