16546465651 has 4 divisors (see below), whose sum is σ = 16553005704. Its totient is φ = 16539925600.

The previous prime is 16546465643. The next prime is 16546465681. The reversal of 16546465651 is 15656464561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15656464561 = 43 ⋅364103827.

It is a cyclic number.

It is not a de Polignac number, because 16546465651 - 2³ = 16546465643 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16546465595 and 16546465604.

It is not an unprimeable number, because it can be changed into a prime (16546465631) 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, 3266230 + ... + 3271291.

It is an arithmetic number, because the mean of its divisors is an integer number (4138251426).

Almost surely, 2^16546465651 is an apocalyptic number.

16546465651 is a deficient number, since it is larger than the sum of its proper divisors (6540053).

16546465651 is an equidigital number, since it uses as much as digits as its factorization.

16546465651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6540052.

The product of its digits is 2592000, while the sum is 49.

The spelling of 16546465651 in words is "sixteen billion, five hundred forty-six million, four hundred sixty-five thousand, six hundred fifty-one".