1998534648297 has 16 divisors (see below), whose sum is σ = 2907064824768. Its totient is φ = 1211189230080.

The previous prime is 1998534648277. The next prime is 1998534648371. The reversal of 1998534648297 is 7928464358991.

It is not a de Polignac number, because 1998534648297 - 2⁶ = 1998534648233 is a prime.

It is a super-2 number, since 2×1998534648297² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1998534648277) 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, 160828 + ... + 2005725.

It is an arithmetic number, because the mean of its divisors is an integer number (181691551548).

Almost surely, 2^{1998534648297} is an apocalyptic number.

It is an amenable number.

1998534648297 is a deficient number, since it is larger than the sum of its proper divisors (908530176471).

1998534648297 is a wasteful number, since it uses less digits than its factorization.

1998534648297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2194520.

The product of its digits is 940584960, while the sum is 75.

The spelling of 1998534648297 in words is "one trillion, nine hundred ninety-eight billion, five hundred thirty-four million, six hundred forty-eight thousand, two hundred ninety-seven".