16633400401 has 2 divisors, whose sum is σ = 16633400402. Its totient is φ = 16633400400.

The previous prime is 16633400323. The next prime is 16633400461. The reversal of 16633400401 is 10400433661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16575275025 + 58125376 = 128745^2 + 7624^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16633400401 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16633400401.

It is not a weakly prime, because it can be changed into another prime (16633400461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8316700200 + 8316700201.

It is an arithmetic number, because the mean of its divisors is an integer number (8316700201).

Almost surely, 2^16633400401 is an apocalyptic number.

It is an amenable number.

16633400401 is a deficient number, since it is larger than the sum of its proper divisors (1).

16633400401 is an equidigital number, since it uses as much as digits as its factorization.

16633400401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 28.

The spelling of 16633400401 in words is "sixteen billion, six hundred thirty-three million, four hundred thousand, four hundred one".