67849265691 has 12 divisors (see below), whose sum is σ = 98006752480. Its totient is φ = 45231801840.

The previous prime is 67849265681. The next prime is 67849265713. The reversal of 67849265691 is 19656294876.

67849265691 is a `hidden beast` number, since 6 + 7 + 8 + 49 + 26 + 569 + 1 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-67849265691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67849265681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 730446 + ... + 818076.

Almost surely, 2^67849265691 is an apocalyptic number.

67849265691 is a deficient number, since it is larger than the sum of its proper divisors (30157486789).

67849265691 is a wasteful number, since it uses less digits than its factorization.

67849265691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173666 (or 173663 counting only the distinct ones).

The product of its digits is 39191040, while the sum is 63.

The spelling of 67849265691 in words is "sixty-seven billion, eight hundred forty-nine million, two hundred sixty-five thousand, six hundred ninety-one".