16211637146 has 4 divisors (see below), whose sum is σ = 24317455722. Its totient is φ = 8105818572.

The previous prime is 16211637139. The next prime is 16211637157. The reversal of 16211637146 is 64173611261.

It is a happy number.

16211637146 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 64173611261 = 55633 ⋅1153517.

It can be written as a sum of positive squares in only one way, i.e., 14968299025 + 1243338121 = 122345^2 + 35261^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4052909285 + ... + 4052909288.

Almost surely, 2^16211637146 is an apocalyptic number.

16211637146 is a deficient number, since it is larger than the sum of its proper divisors (8105818576).

16211637146 is an equidigital number, since it uses as much as digits as its factorization.

16211637146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8105818575.

The product of its digits is 36288, while the sum is 38.

The spelling of 16211637146 in words is "sixteen billion, two hundred eleven million, six hundred thirty-seven thousand, one hundred forty-six".