6381647269722 has 80 divisors (see below), whose sum is σ = 15279677847720. Its totient is φ = 1983717568512.

The previous prime is 6381647269661. The next prime is 6381647269847. The reversal of 6381647269722 is 2279627461836.

6381647269722 is a `hidden beast` number, since 6 + 3 + 81 + 6 + 472 + 69 + 7 + 22 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 5185097880561 + 1196549389161 = 2277081^2 + 1093869^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 6381647269722.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 10329303 + ... + 10929674.

Almost surely, 2^{6381647269722} is an apocalyptic number.

6381647269722 is an abundant number, since it is smaller than the sum of its proper divisors (8898030577998).

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

6381647269722 is a wasteful number, since it uses less digits than its factorization.

6381647269722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21259117 (or 21259108 counting only the distinct ones).

The product of its digits is 73156608, while the sum is 63.

The spelling of 6381647269722 in words is "six trillion, three hundred eighty-one billion, six hundred forty-seven million, two hundred sixty-nine thousand, seven hundred twenty-two".