1021664962453 has 2 divisors, whose sum is σ = 1021664962454. Its totient is φ = 1021664962452.

The previous prime is 1021664962429. The next prime is 1021664962477. The reversal of 1021664962453 is 3542694661201.

It is a balanced prime because it is at equal distance from previous prime (1021664962429) and next prime (1021664962477).

It can be written as a sum of positive squares in only one way, i.e., 939810035844 + 81854926609 = 969438^2 + 286103^2 .

It is a cyclic number.

It is not a de Polignac number, because 1021664962453 - 2¹⁷ = 1021664831381 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1021664962397 and 1021664962406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1021664962403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510832481226 + 510832481227.

It is an arithmetic number, because the mean of its divisors is an integer number (510832481227).

Almost surely, 2^{1021664962453} is an apocalyptic number.

It is an amenable number.

1021664962453 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021664962453 is an equidigital number, since it uses as much as digits as its factorization.

1021664962453 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1866240, while the sum is 49.

The spelling of 1021664962453 in words is "one trillion, twenty-one billion, six hundred sixty-four million, nine hundred sixty-two thousand, four hundred fifty-three".