2921631845 has 16 divisors (see below), whose sum is σ = 3828150720. Its totient is φ = 2122896000.

The previous prime is 2921631829. The next prime is 2921631847. The reversal of 2921631845 is 5481361292.

It is not a de Polignac number, because 2921631845 - 2⁴ = 2921631829 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2921631847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38570 + ... + 85620.

It is an arithmetic number, because the mean of its divisors is an integer number (239259420).

Almost surely, 2^2921631845 is an apocalyptic number.

It is an amenable number.

2921631845 is a deficient number, since it is larger than the sum of its proper divisors (906518875).

2921631845 is a wasteful number, since it uses less digits than its factorization.

2921631845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48196.

The product of its digits is 103680, while the sum is 41.

The square root of 2921631845 is about 54052.1215587325. The cubic root of 2921631845 is about 1429.5801080260.

The spelling of 2921631845 in words is "two billion, nine hundred twenty-one million, six hundred thirty-one thousand, eight hundred forty-five".