1821630486463 has 2 divisors, whose sum is σ = 1821630486464. Its totient is φ = 1821630486462.

The previous prime is 1821630486439. The next prime is 1821630486493. The reversal of 1821630486463 is 3646840361281.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1821630486463 - 2²¹ = 1821628389311 is a prime.

It is a super-3 number, since 3×1821630486463³ (a number of 38 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 1821630486463.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1821630486413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 910815243231 + 910815243232.

It is an arithmetic number, because the mean of its divisors is an integer number (910815243232).

Almost surely, 2^{1821630486463} is an apocalyptic number.

1821630486463 is a deficient number, since it is larger than the sum of its proper divisors (1).

1821630486463 is an equidigital number, since it uses as much as digits as its factorization.

1821630486463 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3981312, while the sum is 52.

The spelling of 1821630486463 in words is "one trillion, eight hundred twenty-one billion, six hundred thirty million, four hundred eighty-six thousand, four hundred sixty-three".