67749496091 has 4 divisors (see below), whose sum is σ = 67751736384. Its totient is φ = 67747255800.

The previous prime is 67749496063. The next prime is 67749496093. The reversal of 67749496091 is 19069494776.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 67749496091 - 2³⁴ = 50569626907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67749496093) 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, 1074155 + ... + 1135476.

It is an arithmetic number, because the mean of its divisors is an integer number (16937934096).

Almost surely, 2^67749496091 is an apocalyptic number.

67749496091 is a deficient number, since it is larger than the sum of its proper divisors (2240293).

67749496091 is a wasteful number, since it uses less digits than its factorization.

67749496091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2240292.

The product of its (nonzero) digits is 20575296, while the sum is 62.

The spelling of 67749496091 in words is "sixty-seven billion, seven hundred forty-nine million, four hundred ninety-six thousand, ninety-one".