8471001640 has 32 divisors (see below), whose sum is σ = 19187685000. Its totient is φ = 3365657344.

The previous prime is 8471001631. The next prime is 8471001653. The reversal of 8471001640 is 461001748.

It can be written as a sum of positive squares in 4 ways, for example, as 5362047076 + 3108954564 = 73226^2 + 55758^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 704695 + ... + 716614.

Almost surely, 2^8471001640 is an apocalyptic number.

It is an amenable number.

8471001640 is an abundant number, since it is smaller than the sum of its proper divisors (10716683360).

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

8471001640 is a wasteful number, since it uses less digits than its factorization.

8471001640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1421469 (or 1421465 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 8471001640 is about 92038.0445250767. The cubic root of 8471001640 is about 2038.5040968588.

The spelling of 8471001640 in words is "eight billion, four hundred seventy-one million, one thousand, six hundred forty".