16471421356464 has 200 divisors, whose sum is σ = 48891027211488. Its totient is φ = 5350505518080.

The previous prime is 16471421356463. The next prime is 16471421356471. The reversal of 16471421356464 is 46465312417461.

It is a happy number.

16471421356464 is a `hidden beast` number, since 1 + 6 + 4 + 7 + 1 + 4 + 2 + 13 + 564 + 64 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 16471421356464.

It is not an unprimeable number, because it can be changed into a prime (16471421356463) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 46956894 + ... + 47306370.

Almost surely, 2^{16471421356464} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16471421356464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24445513605744).

16471421356464 is an abundant number, since it is smaller than the sum of its proper divisors (32419605855024).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16471421356464 is a wasteful number, since it uses less digits than its factorization.

16471421356464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350425 (or 350410 counting only the distinct ones).

The product of its digits is 11612160, while the sum is 54.

The spelling of 16471421356464 in words is "sixteen trillion, four hundred seventy-one billion, four hundred twenty-one million, three hundred fifty-six thousand, four hundred sixty-four".