16553940977 has 8 divisors (see below), whose sum is σ = 19275748416. Its totient is φ = 13921373232.

The previous prime is 16553940959. The next prime is 16553940983. The reversal of 16553940977 is 77904935561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16553940977 - 2⁸ = 16553940721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16553940917) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22309523 + ... + 22310264.

It is an arithmetic number, because the mean of its divisors is an integer number (2409468552).

Almost surely, 2^16553940977 is an apocalyptic number.

It is an amenable number.

16553940977 is a deficient number, since it is larger than the sum of its proper divisors (2721807439).

16553940977 is an equidigital number, since it uses as much as digits as its factorization.

16553940977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44619847.

The product of its (nonzero) digits is 7144200, while the sum is 56.

The spelling of 16553940977 in words is "sixteen billion, five hundred fifty-three million, nine hundred forty thousand, nine hundred seventy-seven".