67749213361 has 4 divisors (see below), whose sum is σ = 67752228852. Its totient is φ = 67746197872.

The previous prime is 67749213313. The next prime is 67749213373. The reversal of 67749213361 is 16331294776.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7478963361 + 60270250000 = 86481^2 + 245500^2 .

It is a cyclic number.

It is not a de Polignac number, because 67749213361 - 2²¹ = 67747116209 is a prime.

It is a super-2 number, since 2×67749213361² (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 (67749213761) 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, 1473790 + ... + 1519063.

It is an arithmetic number, because the mean of its divisors is an integer number (16938057213).

Almost surely, 2^67749213361 is an apocalyptic number.

It is an amenable number.

67749213361 is a deficient number, since it is larger than the sum of its proper divisors (3015491).

67749213361 is a wasteful number, since it uses less digits than its factorization.

67749213361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3015490.

The product of its digits is 1143072, while the sum is 49.

The spelling of 67749213361 in words is "sixty-seven billion, seven hundred forty-nine million, two hundred thirteen thousand, three hundred sixty-one".