16651555253 has 8 divisors (see below), whose sum is σ = 17045316288. Its totient is φ = 16258090464.

The previous prime is 16651555247. The next prime is 16651555273. The reversal of 16651555253 is 35255515661.

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 16651555253 - 2¹² = 16651551157 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 (16651555273) 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, 41801 + ... + 187217.

It is an arithmetic number, because the mean of its divisors is an integer number (2130664536).

Almost surely, 2^16651555253 is an apocalyptic number.

It is an amenable number.

16651555253 is a deficient number, since it is larger than the sum of its proper divisors (393761035).

16651555253 is a wasteful number, since it uses less digits than its factorization.

16651555253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148123.

The product of its digits is 675000, while the sum is 44.

The spelling of 16651555253 in words is "sixteen billion, six hundred fifty-one million, five hundred fifty-five thousand, two hundred fifty-three".