16403951963 has 16 divisors (see below), whose sum is σ = 18965638080. Its totient is φ = 13896960000.

The previous prime is 16403951957. The next prime is 16403951981. The reversal of 16403951963 is 36915930461.

16403951963 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 16403951963 - 2⁴ = 16403951947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16403951903) 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 15 ways as a sum of consecutive naturals, for example, 2489333 + ... + 2495913.

It is an arithmetic number, because the mean of its divisors is an integer number (1185352380).

Almost surely, 2^16403951963 is an apocalyptic number.

16403951963 is a deficient number, since it is larger than the sum of its proper divisors (2561686117).

16403951963 is an equidigital number, since it uses as much as digits as its factorization.

16403951963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10678.

The product of its (nonzero) digits is 524880, while the sum is 47.

The spelling of 16403951963 in words is "sixteen billion, four hundred three million, nine hundred fifty-one thousand, nine hundred sixty-three".