16400495001 has 12 divisors (see below), whose sum is σ = 24035987696. Its totient is φ = 9939693720.

The previous prime is 16400494997. The next prime is 16400495003. The reversal of 16400495001 is 10059400461.

It is a happy number.

It is not a de Polignac number, because 16400495001 - 2² = 16400494997 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16400495001.

It is not an unprimeable number, because it can be changed into a prime (16400495003) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22589851 + ... + 22590576.

Almost surely, 2^16400495001 is an apocalyptic number.

16400495001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16400495001 is a deficient number, since it is larger than the sum of its proper divisors (7635492695).

16400495001 is a wasteful number, since it uses less digits than its factorization.

16400495001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45180452 (or 45180441 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

Adding to 16400495001 its reverse (10059400461), we get a palindrome (26459895462).

The spelling of 16400495001 in words is "sixteen billion, four hundred million, four hundred ninety-five thousand, one".