16478635801 has 4 divisors (see below), whose sum is σ = 16704370612. Its totient is φ = 16252900992.

The previous prime is 16478635793. The next prime is 16478635819. The reversal of 16478635801 is 10853687461.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14360427225 + 2118208576 = 119835^2 + 46024^2 .

It is a cyclic number.

It is not a de Polignac number, because 16478635801 - 2³ = 16478635793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16478635861) 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, 112867296 + ... + 112867441.

It is an arithmetic number, because the mean of its divisors is an integer number (4176092653).

Almost surely, 2^16478635801 is an apocalyptic number.

It is an amenable number.

16478635801 is a deficient number, since it is larger than the sum of its proper divisors (225734811).

16478635801 is an equidigital number, since it uses as much as digits as its factorization.

16478635801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225734810.

The product of its (nonzero) digits is 967680, while the sum is 49.

The spelling of 16478635801 in words is "sixteen billion, four hundred seventy-eight million, six hundred thirty-five thousand, eight hundred one".