67850755442649 has 9 divisors (see below), whose sum is σ = 98006682444853. Its totient is φ = 45233820487452.

The previous prime is 67850755442597. The next prime is 67850755442663. The reversal of 67850755442649 is 94624455705876.

The square root of 67850755442649 is 8237157.

It is a perfect power (a square), and thus also a powerful number.

67850755442649 is a `hidden beast` number, since 6 + 7 + 8 + 5 + 0 + 7 + 554 + 4 + 2 + 64 + 9 = 666.

It is a tau number, because it is divible by the number of its divisors (9).

It is a de Polignac number, because none of the positive numbers 2^k-67850755442649 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (67850755492649) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 23338612 + ... + 26084330.

Almost surely, 2^{67850755442649} is an apocalyptic number.

67850755442649 is the 8237157-th square number.

67850755442649 is the 4118579-th centered octagonal number.

It is an amenable number.

67850755442649 is a deficient number, since it is larger than the sum of its proper divisors (30155927002204).

67850755442649 is an frugal number, since it uses more digits than its factorization.

67850755442649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5491444 (or 2745722 counting only the distinct ones).

The product of its (nonzero) digits is 2032128000, while the sum is 72.

The spelling of 67850755442649 in words is "sixty-seven trillion, eight hundred fifty billion, seven hundred fifty-five million, four hundred forty-two thousand, six hundred forty-nine".