16400431411 has 16 divisors (see below), whose sum is σ = 20730695104. Its totient is φ = 12625455744.

The previous prime is 16400431349. The next prime is 16400431433. The reversal of 16400431411 is 11413400461.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 16400431411 - 2⁷ = 16400431283 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16400431711) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2432100 + ... + 2438833.

It is an arithmetic number, because the mean of its divisors is an integer number (1295668444).

Almost surely, 2^16400431411 is an apocalyptic number.

16400431411 is a deficient number, since it is larger than the sum of its proper divisors (4330263693).

16400431411 is a wasteful number, since it uses less digits than its factorization.

16400431411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4870990.

The product of its (nonzero) digits is 1152, while the sum is 25.

Adding to 16400431411 its reverse (11413400461), we get a palindrome (27813831872).

The spelling of 16400431411 in words is "sixteen billion, four hundred million, four hundred thirty-one thousand, four hundred eleven".