16512226401 has 24 divisors (see below), whose sum is σ = 25251912000. Its totient is φ = 9572300320.

The previous prime is 16512226397. The next prime is 16512226403. The reversal of 16512226401 is 10462221561.

It is not a de Polignac number, because 16512226401 - 2² = 16512226397 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16512226403) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 980526 + ... + 997223.

It is an arithmetic number, because the mean of its divisors is an integer number (1052163000).

Almost surely, 2^16512226401 is an apocalyptic number.

16512226401 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16512226401 is a deficient number, since it is larger than the sum of its proper divisors (8739685599).

16512226401 is a wasteful number, since it uses less digits than its factorization.

16512226401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1977797 (or 1977786 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 30.

Adding to 16512226401 its reverse (10462221561), we get a palindrome (26974447962).

The spelling of 16512226401 in words is "sixteen billion, five hundred twelve million, two hundred twenty-six thousand, four hundred one".