67542237505 has 32 divisors (see below), whose sum is σ = 84819225600. Its totient is φ = 51572505600.

The previous prime is 67542237431. The next prime is 67542237541. The reversal of 67542237505 is 50573224576.

67542237505 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-67542237505 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5636170 + ... + 5648140.

It is an arithmetic number, because the mean of its divisors is an integer number (2650600800).

Almost surely, 2^67542237505 is an apocalyptic number.

It is an amenable number.

67542237505 is a deficient number, since it is larger than the sum of its proper divisors (17276988095).

67542237505 is a wasteful number, since it uses less digits than its factorization.

67542237505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12505.

The product of its (nonzero) digits is 1764000, while the sum is 46.

The spelling of 67542237505 in words is "sixty-seven billion, five hundred forty-two million, two hundred thirty-seven thousand, five hundred five".