8421670551 has 8 divisors (see below), whose sum is σ = 12833021824. Its totient is φ = 4812383160.

The previous prime is 8421670519. The next prime is 8421670573. The reversal of 8421670551 is 1550761248.

8421670551 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 8421670551 - 2⁵ = 8421670519 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8421670651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 200515945 + ... + 200515986.

It is an arithmetic number, because the mean of its divisors is an integer number (1604127728).

Almost surely, 2^8421670551 is an apocalyptic number.

8421670551 is a deficient number, since it is larger than the sum of its proper divisors (4411351273).

8421670551 is a wasteful number, since it uses less digits than its factorization.

8421670551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401031941.

The product of its (nonzero) digits is 67200, while the sum is 39.

The square root of 8421670551 is about 91769.6602968541. The cubic root of 8421670551 is about 2034.5392973762.

The spelling of 8421670551 in words is "eight billion, four hundred twenty-one million, six hundred seventy thousand, five hundred fifty-one".