8178473421 has 16 divisors (see below), whose sum is σ = 12126563520. Its totient is φ = 5447677680.

The previous prime is 8178473399. The next prime is 8178473437. The reversal of 8178473421 is 1243748718.

8178473421 is a `hidden beast` number, since 8 + 178 + 473 + 4 + 2 + 1 = 666.

It is not a de Polignac number, because 8178473421 - 2⁶ = 8178473357 is a prime.

It is a super-3 number, since 3×8178473421³ (a number of 31 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8178473491) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 96355 + ... + 160128.

It is an arithmetic number, because the mean of its divisors is an integer number (757910220).

Almost surely, 2^8178473421 is an apocalyptic number.

It is an amenable number.

8178473421 is a deficient number, since it is larger than the sum of its proper divisors (3948090099).

8178473421 is a wasteful number, since it uses less digits than its factorization.

8178473421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257673 (or 257667 counting only the distinct ones).

The product of its digits is 301056, while the sum is 45.

The square root of 8178473421 is about 90434.9126222832. The cubic root of 8178473421 is about 2014.7635359293.

The spelling of 8178473421 in words is "eight billion, one hundred seventy-eight million, four hundred seventy-three thousand, four hundred twenty-one".