8216399475 has 18 divisors (see below), whose sum is σ = 14716484796. Its totient is φ = 4382079600.

The previous prime is 8216399473. The next prime is 8216399497. The reversal of 8216399475 is 5749936128.

8216399475 is a `hidden beast` number, since 8 + 2 + 163 + 9 + 9 + 475 = 666.

It is not a de Polignac number, because 8216399475 - 2¹ = 8216399473 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8216399473) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 18258441 + ... + 18258890.

Almost surely, 2^8216399475 is an apocalyptic number.

8216399475 is a deficient number, since it is larger than the sum of its proper divisors (6500085321).

8216399475 is a wasteful number, since it uses less digits than its factorization.

8216399475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36517347 (or 36517339 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 54.

The square root of 8216399475 is about 90644.3571051171. The cubic root of 8216399475 is about 2017.8730901156.

The spelling of 8216399475 in words is "eight billion, two hundred sixteen million, three hundred ninety-nine thousand, four hundred seventy-five".