91142077769 has 8 divisors (see below), whose sum is σ = 91763995392. Its totient is φ = 90520401600.

The previous prime is 91142077751. The next prime is 91142077799. The reversal of 91142077769 is 96777024119.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 91142077769 - 2²⁸ = 90873642313 is a prime.

It is a super-2 number, since 2×91142077769² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 91142077769.

It is not an unprimeable number, because it can be changed into a prime (91142077799) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 732512 + ... + 847854.

It is an arithmetic number, because the mean of its divisors is an integer number (11470499424).

Almost surely, 2^91142077769 is an apocalyptic number.

It is an amenable number.

91142077769 is a deficient number, since it is larger than the sum of its proper divisors (621917623).

91142077769 is a wasteful number, since it uses less digits than its factorization.

91142077769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120727.

The product of its (nonzero) digits is 1333584, while the sum is 53.

The spelling of 91142077769 in words is "ninety-one billion, one hundred forty-two million, seventy-seven thousand, seven hundred sixty-nine".