16165451651 has 4 divisors (see below), whose sum is σ = 16170895704. Its totient is φ = 16160007600.

The previous prime is 16165451597. The next prime is 16165451671. The reversal of 16165451651 is 15615456161.

It is a happy number.

16165451651 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15615456161 = 33521 ⋅465841.

It is a cyclic number.

It is not a de Polignac number, because 16165451651 - 2¹⁴ = 16165435267 is a prime.

It is a super-2 number, since 2×16165451651² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16165451599 and 16165451608.

It is not an unprimeable number, because it can be changed into a prime (16165451671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2717570 + ... + 2723511.

It is an arithmetic number, because the mean of its divisors is an integer number (4042723926).

Almost surely, 2^16165451651 is an apocalyptic number.

16165451651 is a deficient number, since it is larger than the sum of its proper divisors (5444053).

16165451651 is an equidigital number, since it uses as much as digits as its factorization.

16165451651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5444052.

The product of its digits is 108000, while the sum is 41.

The spelling of 16165451651 in words is "sixteen billion, one hundred sixty-five million, four hundred fifty-one thousand, six hundred fifty-one".