16400016394 has 8 divisors (see below), whose sum is σ = 24825713220. Its totient is φ = 8124778656.

The previous prime is 16400016377. The next prime is 16400016427. The reversal of 16400016394 is 49361000461.

It can be written as a sum of positive squares in 2 ways, for example, as 15947901225 + 452115169 = 126285^2 + 21263^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37614499 + ... + 37614934.

Almost surely, 2^16400016394 is an apocalyptic number.

16400016394 is a deficient number, since it is larger than the sum of its proper divisors (8425696826).

16400016394 is a wasteful number, since it uses less digits than its factorization.

16400016394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75229544.

The product of its (nonzero) digits is 15552, while the sum is 34.

The spelling of 16400016394 in words is "sixteen billion, four hundred million, sixteen thousand, three hundred ninety-four".