91998348584925 has 48 divisors (see below), whose sum is σ = 160624228677120. Its totient is φ = 46333911672000.

The previous prime is 91998348584921. The next prime is 91998348584971. The reversal of 91998348584925 is 52948584389919.

It is not a de Polignac number, because 91998348584925 - 2² = 91998348584921 is a prime.

It is a super-3 number, since 3×91998348584925³ (a number of 43 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Curzon number.

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 47 ways as a sum of consecutive naturals, for example, 103351431 + ... + 104237780.

It is an arithmetic number, because the mean of its divisors is an integer number (3346338097440).

Almost surely, 2^{91998348584925} is an apocalyptic number.

91998348584925 is a gapful number since it is divisible by the number (95) formed by its first and last digit.

It is an amenable number.

91998348584925 is a deficient number, since it is larger than the sum of its proper divisors (68625880092195).

91998348584925 is a wasteful number, since it uses less digits than its factorization.

91998348584925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207589554 (or 207589549 counting only the distinct ones).

The product of its digits is 8062156800, while the sum is 84.

The spelling of 91998348584925 in words is "ninety-one trillion, nine hundred ninety-eight billion, three hundred forty-eight million, five hundred eighty-four thousand, nine hundred twenty-five".