6321601640 has 64 divisors (see below), whose sum is σ = 15070179600. Its totient is φ = 2378334208.

The previous prime is 6321601639. The next prime is 6321601673. The reversal of 6321601640 is 461061236.

6321601640 = T₁₅₁ + T₁₅₂ + ... + T₃₃₅₉.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 2455995364 + 3865606276 = 49558^2 + 62174^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1968356 + ... + 1971564.

Almost surely, 2^6321601640 is an apocalyptic number.

It is an amenable number.

6321601640 is an abundant number, since it is smaller than the sum of its proper divisors (8748577960).

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

6321601640 is a wasteful number, since it uses less digits than its factorization.

6321601640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6134 (or 6130 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 6321601640 is about 79508.5004260551. The cubic root of 6321601640 is about 1849.0232623463.

Adding to 6321601640 its reverse (461061236), we get a palindrome (6782662876).

The spelling of 6321601640 in words is "six billion, three hundred twenty-one million, six hundred one thousand, six hundred forty".