685454172095 has 128 divisors (see below), whose sum is σ = 1090836633600. Its totient is φ = 409514434560.

The previous prime is 685454172047. The next prime is 685454172097. The reversal of 685454172095 is 590271454586.

It is not a de Polignac number, because 685454172095 - 2¹⁰ = 685454171071 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 685454172095.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685454172097) 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 127 ways as a sum of consecutive naturals, for example, 46759007 + ... + 46773663.

It is an arithmetic number, because the mean of its divisors is an integer number (8522161200).

Almost surely, 2^685454172095 is an apocalyptic number.

685454172095 is a deficient number, since it is larger than the sum of its proper divisors (405382461505).

685454172095 is a wasteful number, since it uses less digits than its factorization.

685454172095 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14798 (or 14784 counting only the distinct ones).

The product of its (nonzero) digits is 12096000, while the sum is 56.

The spelling of 685454172095 in words is "six hundred eighty-five billion, four hundred fifty-four million, one hundred seventy-two thousand, ninety-five".