1821047937461 has 8 divisors (see below), whose sum is σ = 1877281834560. Its totient is φ = 1765659663072.

The previous prime is 1821047937439. The next prime is 1821047937479. The reversal of 1821047937461 is 1647397401281.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1821047937461 - 2¹⁰ = 1821047936437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1821047937421) 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, 211401305 + ... + 211409918.

It is an arithmetic number, because the mean of its divisors is an integer number (234660229320).

Almost surely, 2^{1821047937461} is an apocalyptic number.

It is an amenable number.

1821047937461 is a deficient number, since it is larger than the sum of its proper divisors (56233897099).

1821047937461 is an equidigital number, since it uses as much as digits as its factorization.

1821047937461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422811355.

The product of its (nonzero) digits is 2032128, while the sum is 53.

The spelling of 1821047937461 in words is "one trillion, eight hundred twenty-one billion, forty-seven million, nine hundred thirty-seven thousand, four hundred sixty-one".