646402147171 has 8 divisors (see below), whose sum is σ = 716726077488. Its totient is φ = 578004900000.

The previous prime is 646402147133. The next prime is 646402147187. The reversal of 646402147171 is 171741204646.

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

It is not a de Polignac number, because 646402147171 - 2³⁷ = 508963193699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (646402147471) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 481670080 + ... + 481671421.

It is an arithmetic number, because the mean of its divisors is an integer number (89590759686).

Almost surely, 2^646402147171 is an apocalyptic number.

646402147171 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

646402147171 is a deficient number, since it is larger than the sum of its proper divisors (70323930317).

646402147171 is a wasteful number, since it uses less digits than its factorization.

646402147171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 963341573.

The product of its (nonzero) digits is 225792, while the sum is 43.

The spelling of 646402147171 in words is "six hundred forty-six billion, four hundred two million, one hundred forty-seven thousand, one hundred seventy-one".