91998348584926 has 32 divisors (see below), whose sum is σ = 158244625720512. Its totient is φ = 39294626999040.

The previous prime is 91998348584921. The next prime is 91998348584971. The reversal of 91998348584926 is 62948584389919.

It is a happy number.

It is a super-2 number, since 2×91998348584926² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91998348584921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17375260 + ... + 22043056.

It is an arithmetic number, because the mean of its divisors is an integer number (4945144553766).

Almost surely, 2^{91998348584926} is an apocalyptic number.

91998348584926 is a deficient number, since it is larger than the sum of its proper divisors (66246277135586).

91998348584926 is a wasteful number, since it uses less digits than its factorization.

91998348584926 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4672564.

The product of its digits is 9674588160, while the sum is 85.

The spelling of 91998348584926 in words is "ninety-one trillion, nine hundred ninety-eight billion, three hundred forty-eight million, five hundred eighty-four thousand, nine hundred twenty-six".