65381515722 has 24 divisors (see below), whose sum is σ = 141693835140. Its totient is φ = 21788625600.

The previous prime is 65381515711. The next prime is 65381515757. The reversal of 65381515722 is 22751518356.

65381515722 is a `hidden beast` number, since 6 + 53 + 81 + 515 + 7 + 2 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 59775849081 + 5605666641 = 244491^2 + 74871^2 .

It is a super-2 number, since 2×65381515722² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 356697 + ... + 507932.

Almost surely, 2^65381515722 is an apocalyptic number.

65381515722 is an abundant number, since it is smaller than the sum of its proper divisors (76312319418).

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

65381515722 is a wasteful number, since it uses less digits than its factorization.

65381515722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 868838 (or 868835 counting only the distinct ones).

The product of its digits is 504000, while the sum is 45.

The spelling of 65381515722 in words is "sixty-five billion, three hundred eighty-one million, five hundred fifteen thousand, seven hundred twenty-two".