1365440561425 has 54 divisors (see below), whose sum is σ = 1824374010678. Its totient is φ = 1013382696960.

The previous prime is 1365440561411. The next prime is 1365440561449. The reversal of 1365440561425 is 5241650445631.

It can be written as a sum of positive squares in 27 ways, for example, as 164923707664 + 1200516853761 = 406108^2 + 1095681^2 .

It is not a de Polignac number, because 1365440561425 - 2²³ = 1365432172817 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 848626021 + ... + 848627629.

Almost surely, 2^{1365440561425} is an apocalyptic number.

It is an amenable number.

1365440561425 is a deficient number, since it is larger than the sum of its proper divisors (458933449253).

1365440561425 is an frugal number, since it uses more digits than its factorization.

1365440561425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3335 (or 1704 counting only the distinct ones).

The product of its (nonzero) digits is 1728000, while the sum is 46.

The spelling of 1365440561425 in words is "one trillion, three hundred sixty-five billion, four hundred forty million, five hundred sixty-one thousand, four hundred twenty-five".