16447211477 has 4 divisors (see below), whose sum is σ = 16539095520. Its totient is φ = 16355327436.

The previous prime is 16447211461. The next prime is 16447211483. The reversal of 16447211477 is 77411274461.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 16447211477 - 2⁴ = 16447211461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16447211777) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45941753 + ... + 45942110.

It is an arithmetic number, because the mean of its divisors is an integer number (4134773880).

Almost surely, 2^16447211477 is an apocalyptic number.

It is an amenable number.

16447211477 is a deficient number, since it is larger than the sum of its proper divisors (91884043).

16447211477 is an equidigital number, since it uses as much as digits as its factorization.

16447211477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91884042.

The product of its digits is 263424, while the sum is 44.

The spelling of 16447211477 in words is "sixteen billion, four hundred forty-seven million, two hundred eleven thousand, four hundred seventy-seven".