998962940643 has 8 divisors (see below), whose sum is σ = 1344398724288. Its totient is φ = 659751225384.

The previous prime is 998962940641. The next prime is 998962940687. The reversal of 998962940643 is 346049269899.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 998962940643 - 2¹ = 998962940641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (998962940641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1556016721 + ... + 1556017362.

It is an arithmetic number, because the mean of its divisors is an integer number (168049840536).

Almost surely, 2^998962940643 is an apocalyptic number.

998962940643 is a deficient number, since it is larger than the sum of its proper divisors (345435783645).

998962940643 is a wasteful number, since it uses less digits than its factorization.

998962940643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3112034193.

The product of its (nonzero) digits is 181398528, while the sum is 69.

The spelling of 998962940643 in words is "nine hundred ninety-eight billion, nine hundred sixty-two million, nine hundred forty thousand, six hundred forty-three".