16177920863 has 4 divisors (see below), whose sum is σ = 17422376328. Its totient is φ = 14933465400.

The previous prime is 16177920859. The next prime is 16177920877. The reversal of 16177920863 is 36802977161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36802977161 = 71 ⋅518351791.

It is a cyclic number.

It is not a de Polignac number, because 16177920863 - 2² = 16177920859 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16177920763) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 622227713 + ... + 622227738.

It is an arithmetic number, because the mean of its divisors is an integer number (4355594082).

Almost surely, 2^16177920863 is an apocalyptic number.

16177920863 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

16177920863 is a deficient number, since it is larger than the sum of its proper divisors (1244455465).

16177920863 is a wasteful number, since it uses less digits than its factorization.

16177920863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1244455464.

The product of its (nonzero) digits is 762048, while the sum is 50.

The spelling of 16177920863 in words is "sixteen billion, one hundred seventy-seven million, nine hundred twenty thousand, eight hundred sixty-three".