1821066464508 has 24 divisors (see below), whose sum is σ = 4258253930112. Its totient is φ = 605722319664.

The previous prime is 1821066464507. The next prime is 1821066464527. The reversal of 1821066464508 is 8054646601281.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1821066464507) 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, 162473560 + ... + 162484767.

It is an arithmetic number, because the mean of its divisors is an integer number (177427247088).

Almost surely, 2^{1821066464508} is an apocalyptic number.

It is an amenable number.

1821066464508 is an abundant number, since it is smaller than the sum of its proper divisors (2437187465604).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1821066464508 is a wasteful number, since it uses less digits than its factorization.

1821066464508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324958801 (or 324958799 counting only the distinct ones).

The product of its (nonzero) digits is 2211840, while the sum is 51.

The spelling of 1821066464508 in words is "one trillion, eight hundred twenty-one billion, sixty-six million, four hundred sixty-four thousand, five hundred eight".