996145721041 has 3 divisors (see below), whose sum is σ = 996146719113. Its totient is φ = 996144722970.

The previous prime is 996145721017. The next prime is 996145721071. The reversal of 996145721041 is 140127541699.

The square root of 996145721041 is 998071.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 996145721041 - 2³³ = 987555786449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (996145721071) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 499036 + ... + 1497106.

It is an arithmetic number, because the mean of its divisors is an integer number (332048906371).

Almost surely, 2^996145721041 is an apocalyptic number.

996145721041 is the 998071-st square number.

996145721041 is the 499036-th centered octagonal number.

It is an amenable number.

996145721041 is a deficient number, since it is larger than the sum of its proper divisors (998072).

996145721041 is an frugal number, since it uses more digits than its factorization.

996145721041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1996142 (or 998071 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 49.

Multiplying 996145721041 by its sum of digits (49), we get a square (48811140331009 = 6986497²).

The spelling of 996145721041 in words is "nine hundred ninety-six billion, one hundred forty-five million, seven hundred twenty-one thousand, forty-one".