1021663430263 has 24 divisors (see below), whose sum is σ = 1259618632272. Its totient is φ = 823384767744.

The previous prime is 1021663430261. The next prime is 1021663430299. The reversal of 1021663430263 is 3620343661201.

It is not a de Polignac number, because 1021663430263 - 2¹ = 1021663430261 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021663430261) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 238456 + ... + 1449202.

It is an arithmetic number, because the mean of its divisors is an integer number (52484109678).

Almost surely, 2^{1021663430263} is an apocalyptic number.

1021663430263 is a deficient number, since it is larger than the sum of its proper divisors (237955202009).

1021663430263 is a wasteful number, since it uses less digits than its factorization.

1021663430263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1211791 (or 1211784 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 37.

The spelling of 1021663430263 in words is "one trillion, twenty-one billion, six hundred sixty-three million, four hundred thirty thousand, two hundred sixty-three".