763821818401 has 2 divisors, whose sum is σ = 763821818402. Its totient is φ = 763821818400.

The previous prime is 763821818399. The next prime is 763821818437. The reversal of 763821818401 is 104818128367.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 734450714001 + 29371104400 = 857001^2 + 171380^2 .

It is a cyclic number.

It is not a de Polignac number, because 763821818401 - 2¹ = 763821818399 is a prime.

Together with 763821818399, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (763821812401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 381910909200 + 381910909201.

It is an arithmetic number, because the mean of its divisors is an integer number (381910909201).

Almost surely, 2^763821818401 is an apocalyptic number.

It is an amenable number.

763821818401 is a deficient number, since it is larger than the sum of its proper divisors (1).

763821818401 is an equidigital number, since it uses as much as digits as its factorization.

763821818401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 516096, while the sum is 49.

The spelling of 763821818401 in words is "seven hundred sixty-three billion, eight hundred twenty-one million, eight hundred eighteen thousand, four hundred one".