6421772752 has 20 divisors (see below), whose sum is σ = 12491762976. Its totient is φ = 3198092000.

The previous prime is 6421772737. The next prime is 6421772759. The reversal of 6421772752 is 2572771246.

It is a junction number, because it is equal to n+sod(n) for n = 6421772699 and 6421772708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6421772759) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 795508 + ... + 803539.

Almost surely, 2^6421772752 is an apocalyptic number.

It is an amenable number.

6421772752 is a deficient number, since it is larger than the sum of its proper divisors (6069990224).

6421772752 is a wasteful number, since it uses less digits than its factorization.

6421772752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1599306 (or 1599300 counting only the distinct ones).

The product of its digits is 329280, while the sum is 43.

The square root of 6421772752 is about 80135.9641609184. The cubic root of 6421772752 is about 1858.7385704596.

The spelling of 6421772752 in words is "six billion, four hundred twenty-one million, seven hundred seventy-two thousand, seven hundred fifty-two".