68540516 has 24 divisors (see below), whose sum is σ = 131060160. Its totient is φ = 31104800.

The previous prime is 68540453. The next prime is 68540551. The reversal of 68540516 is 61504586.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51305 + ... + 52623.

It is an arithmetic number, because the mean of its divisors is an integer number (5460840).

Almost surely, 2^68540516 is an apocalyptic number.

It is an amenable number.

68540516 is a deficient number, since it is larger than the sum of its proper divisors (62519644).

68540516 is a wasteful number, since it uses less digits than its factorization.

68540516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2515 (or 2513 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 35.

The square root of 68540516 is about 8278.9199778715. The cubic root of 68540516 is about 409.2441278611.

The spelling of 68540516 in words is "sixty-eight million, five hundred forty thousand, five hundred sixteen".