67121215652 has 24 divisors (see below), whose sum is σ = 123504841152. Its totient is φ = 31856396000.

The previous prime is 67121215597. The next prime is 67121215669. The reversal of 67121215652 is 25651212176.

67121215652 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 2772599 + ... + 2796702.

It is an arithmetic number, because the mean of its divisors is an integer number (5146035048).

Almost surely, 2^67121215652 is an apocalyptic number.

It is an amenable number.

67121215652 is a deficient number, since it is larger than the sum of its proper divisors (56383625500).

67121215652 is a wasteful number, since it uses less digits than its factorization.

67121215652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5569459 (or 5569457 counting only the distinct ones).

The product of its digits is 50400, while the sum is 38.

The spelling of 67121215652 in words is "sixty-seven billion, one hundred twenty-one million, two hundred fifteen thousand, six hundred fifty-two".