91431433145122 has 16 divisors (see below), whose sum is σ = 157482441387072. Its totient is φ = 38999189491920.

The previous prime is 91431433145051. The next prime is 91431433145137. The reversal of 91431433145122 is 22154133413419.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15475865893 + ... + 15475871800.

It is an arithmetic number, because the mean of its divisors is an integer number (9842652586692).

Almost surely, 2^{91431433145122} is an apocalyptic number.

91431433145122 is a deficient number, since it is larger than the sum of its proper divisors (66051008241950).

91431433145122 is a wasteful number, since it uses less digits than its factorization.

91431433145122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30951737913.

The product of its digits is 311040, while the sum is 43.

The spelling of 91431433145122 in words is "ninety-one trillion, four hundred thirty-one billion, four hundred thirty-three million, one hundred forty-five thousand, one hundred twenty-two".