2921316081845 has 16 divisors (see below), whose sum is σ = 4144527250560. Its totient is φ = 1934112715584.

The previous prime is 2921316081823. The next prime is 2921316081869. The reversal of 2921316081845 is 5481806131292.

It is not a de Polignac number, because 2921316081845 - 2⁸ = 2921316081589 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2921316081793 and 2921316081802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1439070947 + ... + 1439072976.

It is an arithmetic number, because the mean of its divisors is an integer number (259032953160).

Almost surely, 2^{2921316081845} is an apocalyptic number.

It is an amenable number.

2921316081845 is a deficient number, since it is larger than the sum of its proper divisors (1223211168715).

2921316081845 is a wasteful number, since it uses less digits than its factorization.

2921316081845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2878143964.

The product of its (nonzero) digits is 829440, while the sum is 50.

The spelling of 2921316081845 in words is "two trillion, nine hundred twenty-one billion, three hundred sixteen million, eighty-one thousand, eight hundred forty-five".