16451505947 has 2 divisors, whose sum is σ = 16451505948. Its totient is φ = 16451505946.

The previous prime is 16451505937. The next prime is 16451505997. The reversal of 16451505947 is 74950515461.

It is a weak prime.

It is an emirp because it is prime and its reverse (74950515461) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16451505947 - 2⁸ = 16451505691 is a prime.

It is not a weakly prime, because it can be changed into another prime (16451505937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8225752973 + 8225752974.

It is an arithmetic number, because the mean of its divisors is an integer number (8225752974).

Almost surely, 2^16451505947 is an apocalyptic number.

16451505947 is a deficient number, since it is larger than the sum of its proper divisors (1).

16451505947 is an equidigital number, since it uses as much as digits as its factorization.

16451505947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 756000, while the sum is 47.

The spelling of 16451505947 in words is "sixteen billion, four hundred fifty-one million, five hundred five thousand, nine hundred forty-seven".