2921819838664 has 32 divisors (see below), whose sum is σ = 5619947873400. Its totient is φ = 1423267591680.

The previous prime is 2921819838601. The next prime is 2921819838667. The reversal of 2921819838664 is 4668389181292.

It can be written as a sum of positive squares in 4 ways, for example, as 1101991858564 + 1819827980100 = 1049758^2 + 1349010^2 .

It is a super-2 number, since 2×2921819838664² (a number of 26 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2921819838664.

It is not an unprimeable number, because it can be changed into a prime (2921819838667) 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, 6049527 + ... + 6514630.

Almost surely, 2^{2921819838664} is an apocalyptic number.

It is an amenable number.

2921819838664 is a deficient number, since it is larger than the sum of its proper divisors (2698128034736).

2921819838664 is a wasteful number, since it uses less digits than its factorization.

2921819838664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12564913 (or 12564909 counting only the distinct ones).

The product of its digits is 71663616, while the sum is 67.

The spelling of 2921819838664 in words is "two trillion, nine hundred twenty-one billion, eight hundred nineteen million, eight hundred thirty-eight thousand, six hundred sixty-four".