998495628481 has 64 divisors (see below), whose sum is σ = 1164931891200. Its totient is φ = 848159424000.

The previous prime is 998495628463. The next prime is 998495628497. The reversal of 998495628481 is 184826594899.

It is a 3-Lehmer number, since φ(998495628481) divides (998495628481-1)³.

It is a cyclic number.

It is not a de Polignac number, because 998495628481 - 2¹³ = 998495620289 is a prime.

It is a super-2 number, since 2×998495628481² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (998495620481) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 336305565 + ... + 336308533.

It is an arithmetic number, because the mean of its divisors is an integer number (18202060800).

It is a Poulet number, since it divides 2^998495628480-1.

Almost surely, 2^998495628481 is an apocalyptic number.

It is an amenable number.

998495628481 is a deficient number, since it is larger than the sum of its proper divisors (166436262719).

998495628481 is a wasteful number, since it uses less digits than its factorization.

998495628481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3350.

The product of its digits is 358318080, while the sum is 73.

The spelling of 998495628481 in words is "nine hundred ninety-eight billion, four hundred ninety-five million, six hundred twenty-eight thousand, four hundred eighty-one".