1012553403563 has 4 divisors (see below), whose sum is σ = 1090442126928. Its totient is φ = 934664680200.

The previous prime is 1012553403497. The next prime is 1012553403569. The reversal of 1012553403563 is 3653043552101.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1012553403563 - 2²⁴ = 1012536626347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1012553403569) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38944361663 + ... + 38944361688.

It is an arithmetic number, because the mean of its divisors is an integer number (272610531732).

Almost surely, 2^{1012553403563} is an apocalyptic number.

1012553403563 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1012553403563 is a deficient number, since it is larger than the sum of its proper divisors (77888723365).

1012553403563 is an equidigital number, since it uses as much as digits as its factorization.

1012553403563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77888723364.

The product of its (nonzero) digits is 162000, while the sum is 38.

Adding to 1012553403563 its reverse (3653043552101), we get a palindrome (4665596955664).

The spelling of 1012553403563 in words is "one trillion, twelve billion, five hundred fifty-three million, four hundred three thousand, five hundred sixty-three".