1373456818563 has 16 divisors (see below), whose sum is σ = 1928501752320. Its totient is φ = 867067034976.

The previous prime is 1373456818549. The next prime is 1373456818583. The reversal of 1373456818563 is 3658186543731.

It is not a de Polignac number, because 1373456818563 - 2¹² = 1373456814467 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1373456818497 and 1373456818506.

It is not an unprimeable number, because it can be changed into a prime (1373456818523) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5137620 + ... + 5398337.

It is an arithmetic number, because the mean of its divisors is an integer number (120531359520).

Almost surely, 2^{1373456818563} is an apocalyptic number.

1373456818563 is a deficient number, since it is larger than the sum of its proper divisors (555044933757).

1373456818563 is a wasteful number, since it uses less digits than its factorization.

1373456818563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10538266.

The product of its digits is 43545600, while the sum is 60.

The spelling of 1373456818563 in words is "one trillion, three hundred seventy-three billion, four hundred fifty-six million, eight hundred eighteen thousand, five hundred sixty-three".