67528434789 has 6 divisors (see below), whose sum is σ = 97541072486. Its totient is φ = 45018956520.

The previous prime is 67528434767. The next prime is 67528434913. The reversal of 67528434789 is 98743482576.

67528434789 is a `hidden beast` number, since 6 + 7 + 5 + 284 + 347 + 8 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 51663017025 + 15865417764 = 227295^2 + 125958^2 .

It is not a de Polignac number, because 67528434789 - 2⁹ = 67528434277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67528434989) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3751579702 + ... + 3751579719.

Almost surely, 2^67528434789 is an apocalyptic number.

It is an amenable number.

67528434789 is a deficient number, since it is larger than the sum of its proper divisors (30012637697).

67528434789 is a wasteful number, since it uses less digits than its factorization.

67528434789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7503159427 (or 7503159424 counting only the distinct ones).

The product of its digits is 81285120, while the sum is 63.

The spelling of 67528434789 in words is "sixty-seven billion, five hundred twenty-eight million, four hundred thirty-four thousand, seven hundred eighty-nine".