67434435257 has 16 divisors (see below), whose sum is σ = 81138524160. Its totient is φ = 54749075472.

The previous prime is 67434435239. The next prime is 67434435259. The reversal of 67434435257 is 75253443476.

It is not a de Polignac number, because 67434435257 - 2⁶ = 67434435193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (67434435259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 761768 + ... + 845670.

It is an arithmetic number, because the mean of its divisors is an integer number (5071157760).

Almost surely, 2^67434435257 is an apocalyptic number.

It is an amenable number.

67434435257 is a deficient number, since it is larger than the sum of its proper divisors (13704088903).

67434435257 is a wasteful number, since it uses less digits than its factorization.

67434435257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89972.

The product of its digits is 8467200, while the sum is 50.

The spelling of 67434435257 in words is "sixty-seven billion, four hundred thirty-four million, four hundred thirty-five thousand, two hundred fifty-seven".