67443132491 has 12 divisors (see below), whose sum is σ = 80367777000. Its totient is φ = 56398436640.

The previous prime is 67443132451. The next prime is 67443132499. The reversal of 67443132491 is 19423134476.

It is not a de Polignac number, because 67443132491 - 2³⁴ = 50263263307 is a prime.

It is a super-2 number, since 2×67443132491² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (67443132499) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16783241 + ... + 16787258.

It is an arithmetic number, because the mean of its divisors is an integer number (6697314750).

Almost surely, 2^67443132491 is an apocalyptic number.

67443132491 is a deficient number, since it is larger than the sum of its proper divisors (12924644509).

67443132491 is a wasteful number, since it uses less digits than its factorization.

67443132491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33570554 (or 33570547 counting only the distinct ones).

The product of its digits is 435456, while the sum is 44.

The spelling of 67443132491 in words is "sixty-seven billion, four hundred forty-three million, one hundred thirty-two thousand, four hundred ninety-one".