6451211982 has 16 divisors (see below), whose sum is σ = 13094998272. Its totient is φ = 2118308280.

The previous prime is 6451211981. The next prime is 6451212067. The reversal of 6451211982 is 2891121546.

It is a self number, because there is not a number n which added to its sum of digits gives 6451211982.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6451211981) 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, 8023494 + ... + 8024297.

It is an arithmetic number, because the mean of its divisors is an integer number (818437392).

Almost surely, 2^6451211982 is an apocalyptic number.

6451211982 is an abundant number, since it is smaller than the sum of its proper divisors (6643786290).

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

6451211982 is a wasteful number, since it uses less digits than its factorization.

6451211982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16047863.

The product of its digits is 34560, while the sum is 39.

The square root of 6451211982 is about 80319.4371369720. The cubic root of 6451211982 is about 1861.5745696778.

The spelling of 6451211982 in words is "six billion, four hundred fifty-one million, two hundred eleven thousand, nine hundred eighty-two".