67940618816 has 28 divisors (see below), whose sum is σ = 154079618688. Its totient is φ = 29117407872.

The previous prime is 67940618803. The next prime is 67940618821. The reversal of 67940618816 is 61881604976.

It is a tau number, because it is divible by the number of its divisors (28).

It is a Harshad number since it is a multiple of its sum of digits (56).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75826136 + ... + 75827031.

Almost surely, 2^67940618816 is an apocalyptic number.

It is an amenable number.

67940618816 is an abundant number, since it is smaller than the sum of its proper divisors (86138999872).

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

67940618816 is a wasteful number, since it uses less digits than its factorization.

67940618816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151653186 (or 151653176 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 56.

The spelling of 67940618816 in words is "sixty-seven billion, nine hundred forty million, six hundred eighteen thousand, eight hundred sixteen".