67516112121978 has 16 divisors (see below), whose sum is σ = 145419318416736. Its totient is φ = 20774188345200.

The previous prime is 67516112121967. The next prime is 67516112121989. The reversal of 67516112121978 is 87912121161576.

It is an interprime number because it is at equal distance from previous prime (67516112121967) and next prime (67516112121989).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 432795590448 + ... + 432795590603.

It is an arithmetic number, because the mean of its divisors is an integer number (9088707401046).

Almost surely, 2^{67516112121978} is an apocalyptic number.

67516112121978 is an abundant number, since it is smaller than the sum of its proper divisors (77903206294758).

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

67516112121978 is a wasteful number, since it uses less digits than its factorization.

67516112121978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 865591181069.

The product of its digits is 2540160, while the sum is 57.

The spelling of 67516112121978 in words is "sixty-seven trillion, five hundred sixteen billion, one hundred twelve million, one hundred twenty-one thousand, nine hundred seventy-eight".