67656545434 has 16 divisors (see below), whose sum is σ = 104388818688. Its totient is φ = 32863100112.

The previous prime is 67656545387. The next prime is 67656545491. The reversal of 67656545434 is 43454565676.

67656545434 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

67656545434 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It is an alternating number because its digits alternate between even and odd.

It is an unprimeable number.

It is an upside-down number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 658674 + ... + 754429.

It is an arithmetic number, because the mean of its divisors is an integer number (6524301168).

Almost surely, 2^67656545434 is an apocalyptic number.

67656545434 is a deficient number, since it is larger than the sum of its proper divisors (36732273254).

67656545434 is a wasteful number, since it uses less digits than its factorization.

67656545434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1413789.

The product of its digits is 36288000, while the sum is 55.

The spelling of 67656545434 in words is "sixty-seven billion, six hundred fifty-six million, five hundred forty-five thousand, four hundred thirty-four".