16651534451 has 8 divisors (see below), whose sum is σ = 16874480784. Its totient is φ = 16429119840.

The previous prime is 16651534399. The next prime is 16651534483. The reversal of 16651534451 is 15443515661.

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 16651534451 - 2⁶ = 16651534387 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16651534399 and 16651534408.

It is not an unprimeable number, because it can be changed into a prime (16651534351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69680 + ... + 195341.

It is an arithmetic number, because the mean of its divisors is an integer number (2109310098).

Almost surely, 2^16651534451 is an apocalyptic number.

16651534451 is a deficient number, since it is larger than the sum of its proper divisors (222946333).

16651534451 is an equidigital number, since it uses as much as digits as its factorization.

16651534451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265861.

The product of its digits is 216000, while the sum is 41.

The spelling of 16651534451 in words is "sixteen billion, six hundred fifty-one million, five hundred thirty-four thousand, four hundred fifty-one".