6421651132 has 24 divisors (see below), whose sum is σ = 12383796656. Its totient is φ = 2894911488.

The previous prime is 6421651127. The next prime is 6421651151. The reversal of 6421651132 is 2311561246.

It is a happy number.

It is a super-2 number, since 2×6421651132² = 82475206522233762848, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6421651094 and 6421651103.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1433733 + ... + 1438204.

Almost surely, 2^6421651132 is an apocalyptic number.

It is an amenable number.

6421651132 is a deficient number, since it is larger than the sum of its proper divisors (5962145524).

6421651132 is a wasteful number, since it uses less digits than its factorization.

6421651132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2871997 (or 2871995 counting only the distinct ones).

The product of its digits is 8640, while the sum is 31.

The square root of 6421651132 is about 80135.2053220056. The cubic root of 6421651132 is about 1858.7268363575.

The spelling of 6421651132 in words is "six billion, four hundred twenty-one million, six hundred fifty-one thousand, one hundred thirty-two".