67115081540 has 36 divisors (see below), whose sum is σ = 152617320324. Its totient is φ = 24780951936.

The previous prime is 67115081533. The next prime is 67115081549. The reversal of 67115081540 is 4518051176.

It can be written as a sum of positive squares in 6 ways, for example, as 17081444416 + 50033637124 = 130696^2 + 223682^2 .

It is a junction number, because it is equal to n+sod(n) for n = 67115081494 and 67115081503.

It is not an unprimeable number, because it can be changed into a prime (67115081549) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9924887 + ... + 9931646.

It is an arithmetic number, because the mean of its divisors is an integer number (4239370009).

Almost surely, 2^67115081540 is an apocalyptic number.

It is an amenable number.

67115081540 is an abundant number, since it is smaller than the sum of its proper divisors (85502238784).

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

67115081540 is a wasteful number, since it uses less digits than its factorization.

67115081540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19856568 (or 19856553 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 38.

The spelling of 67115081540 in words is "sixty-seven billion, one hundred fifteen million, eighty-one thousand, five hundred forty".