67486887540 has 72 divisors (see below), whose sum is σ = 204733325160. Its totient is φ = 17994472704.

The previous prime is 67486887511. The next prime is 67486887547. The reversal of 67486887540 is 4578868476.

67486887540 is a `hidden beast` number, since 6 + 7 + 4 + 8 + 6 + 8 + 87 + 540 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 3686189796 + 63800697744 = 60714^2 + 252588^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67486887547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2259826 + ... + 2289494.

It is an arithmetic number, because the mean of its divisors is an integer number (2843518405).

Almost surely, 2^67486887540 is an apocalyptic number.

67486887540 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

67486887540 is an abundant number, since it is smaller than the sum of its proper divisors (137246437620).

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

67486887540 is a wasteful number, since it uses less digits than its factorization.

67486887540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42321 (or 42316 counting only the distinct ones).

The product of its (nonzero) digits is 72253440, while the sum is 63.

The spelling of 67486887540 in words is "sixty-seven billion, four hundred eighty-six million, eight hundred eighty-seven thousand, five hundred forty".