1521818920463 has 2 divisors, whose sum is σ = 1521818920464. Its totient is φ = 1521818920462.

The previous prime is 1521818920429. The next prime is 1521818920469. The reversal of 1521818920463 is 3640298181251.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1521818920463 - 2¹² = 1521818916367 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1521818920469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 760909460231 + 760909460232.

It is an arithmetic number, because the mean of its divisors is an integer number (760909460232).

Almost surely, 2^{1521818920463} is an apocalyptic number.

1521818920463 is a deficient number, since it is larger than the sum of its proper divisors (1).

1521818920463 is an equidigital number, since it uses as much as digits as its factorization.

1521818920463 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 829440, while the sum is 50.

The spelling of 1521818920463 in words is "one trillion, five hundred twenty-one billion, eight hundred eighteen million, nine hundred twenty thousand, four hundred sixty-three".