1381375565563 has 4 divisors (see below), whose sum is σ = 1578714932080. Its totient is φ = 1184036199048.

The previous prime is 1381375565543. The next prime is 1381375565573. The reversal of 1381375565563 is 3655655731831.

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 1381375565563 - 2³³ = 1372785630971 is a prime.

It is a super-2 number, since 2×1381375565563² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1381375565498 and 1381375565507.

It is not an unprimeable number, because it can be changed into a prime (1381375565533) 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, 98669683248 + ... + 98669683261.

It is an arithmetic number, because the mean of its divisors is an integer number (394678733020).

Almost surely, 2^{1381375565563} is an apocalyptic number.

1381375565563 is a deficient number, since it is larger than the sum of its proper divisors (197339366517).

1381375565563 is an equidigital number, since it uses as much as digits as its factorization.

1381375565563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197339366516.

The product of its digits is 34020000, while the sum is 58.

The spelling of 1381375565563 in words is "one trillion, three hundred eighty-one billion, three hundred seventy-five million, five hundred sixty-five thousand, five hundred sixty-three".