67149678409 has 4 divisors (see below), whose sum is σ = 73254194640. Its totient is φ = 61045162180.

The previous prime is 67149678301. The next prime is 67149678439. The reversal of 67149678409 is 90487694176.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67149678409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (67149678439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3052258099 + ... + 3052258120.

It is an arithmetic number, because the mean of its divisors is an integer number (18313548660).

Almost surely, 2^67149678409 is an apocalyptic number.

It is an amenable number.

67149678409 is a deficient number, since it is larger than the sum of its proper divisors (6104516231).

67149678409 is a wasteful number, since it uses less digits than its factorization.

67149678409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6104516230.

The product of its (nonzero) digits is 18289152, while the sum is 61.

The spelling of 67149678409 in words is "sixty-seven billion, one hundred forty-nine million, six hundred seventy-eight thousand, four hundred nine".