16644155056879 has 32 divisors (see below), whose sum is σ = 19607897272320. Its totient is φ = 13832697618432.

The previous prime is 16644155056861. The next prime is 16644155056883. The reversal of 16644155056879 is 97865055144661.

It is not a de Polignac number, because 16644155056879 - 2⁵ = 16644155056847 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16644155066879) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 78449062 + ... + 78660940.

It is an arithmetic number, because the mean of its divisors is an integer number (612746789760).

Almost surely, 2^{16644155056879} is an apocalyptic number.

16644155056879 is a deficient number, since it is larger than the sum of its proper divisors (2963742215441).

16644155056879 is a wasteful number, since it uses less digits than its factorization.

16644155056879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214159.

The product of its (nonzero) digits is 217728000, while the sum is 67.

The spelling of 16644155056879 in words is "sixteen trillion, six hundred forty-four billion, one hundred fifty-five million, fifty-six thousand, eight hundred seventy-nine".