67954638369 has 4 divisors (see below), whose sum is σ = 90606184496. Its totient is φ = 45303092244.

The previous prime is 67954638337. The next prime is 67954638383. The reversal of 67954638369 is 96383645976.

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 not a de Polignac number, because 67954638369 - 2⁵ = 67954638337 is a prime.

It is a super-2 number, since 2×67954638369² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67954638469) 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, 11325773059 + ... + 11325773064.

It is an arithmetic number, because the mean of its divisors is an integer number (22651546124).

Almost surely, 2^67954638369 is an apocalyptic number.

It is an amenable number.

67954638369 is a deficient number, since it is larger than the sum of its proper divisors (22651546127).

67954638369 is a wasteful number, since it uses less digits than its factorization.

67954638369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22651546126.

The product of its digits is 176359680, while the sum is 66.

The spelling of 67954638369 in words is "sixty-seven billion, nine hundred fifty-four million, six hundred thirty-eight thousand, three hundred sixty-nine".