7814531320445 has 4 divisors (see below), whose sum is σ = 9377437584540. Its totient is φ = 6251625056352.

The previous prime is 7814531320441. The next prime is 7814531320481. The reversal of 7814531320445 is 5440231354187.

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

It can be written as a sum of positive squares in 2 ways, for example, as 4651863885124 + 3162667435321 = 2156818^2 + 1778389^2 .

It is a cyclic number.

It is not a de Polignac number, because 7814531320445 - 2² = 7814531320441 is a prime.

It is a super-2 number, since 2×7814531320445² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 7814531320445.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7814531320441) 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, 781453132040 + ... + 781453132049.

It is an arithmetic number, because the mean of its divisors is an integer number (2344359396135).

Almost surely, 2^{7814531320445} is an apocalyptic number.

It is an amenable number.

7814531320445 is a deficient number, since it is larger than the sum of its proper divisors (1562906264095).

7814531320445 is a wasteful number, since it uses less digits than its factorization.

7814531320445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1562906264094.

The product of its (nonzero) digits is 1612800, while the sum is 47.

The spelling of 7814531320445 in words is "seven trillion, eight hundred fourteen billion, five hundred thirty-one million, three hundred twenty thousand, four hundred forty-five".