91157168429 has 4 divisors (see below), whose sum is σ = 91165104576. Its totient is φ = 91149232284.

The previous prime is 91157168419. The next prime is 91157168437. The reversal of 91157168429 is 92486175119.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91157168429 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91157168419) 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, 3950819 + ... + 3973824.

It is an arithmetic number, because the mean of its divisors is an integer number (22791276144).

Almost surely, 2^91157168429 is an apocalyptic number.

It is an amenable number.

91157168429 is a deficient number, since it is larger than the sum of its proper divisors (7936147).

91157168429 is a wasteful number, since it uses less digits than its factorization.

91157168429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7936146.

The product of its digits is 1088640, while the sum is 53.

The spelling of 91157168429 in words is "ninety-one billion, one hundred fifty-seven million, one hundred sixty-eight thousand, four hundred twenty-nine".