781313344453 has 16 divisors (see below), whose sum is σ = 824985697536. Its totient is φ = 738481011840.

The previous prime is 781313344439. The next prime is 781313344541. The reversal of 781313344453 is 354443313187.

It is not a de Polignac number, because 781313344453 - 2³⁷ = 643874390981 is a prime.

It is a super-2 number, since 2×781313344453² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (781313344423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 734401 + ... + 1449817.

It is an arithmetic number, because the mean of its divisors is an integer number (51561606096).

Almost surely, 2^781313344453 is an apocalyptic number.

It is an amenable number.

781313344453 is a deficient number, since it is larger than the sum of its proper divisors (43672353083).

781313344453 is a wasteful number, since it uses less digits than its factorization.

781313344453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 716004.

The product of its digits is 1451520, while the sum is 46.

The spelling of 781313344453 in words is "seven hundred eighty-one billion, three hundred thirteen million, three hundred forty-four thousand, four hundred fifty-three".