685111150731 has 48 divisors (see below), whose sum is σ = 1134723824640. Its totient is φ = 365798986560.

The previous prime is 685111150729. The next prime is 685111150739. The reversal of 685111150731 is 137051111586.

685111150731 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 685111150731 - 2¹ = 685111150729 is a prime.

It is a super-2 number, since 2×685111150731² (a number of 24 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 685111150731.

It is not an unprimeable number, because it can be changed into a prime (685111150739) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2459961 + ... + 2724266.

It is an arithmetic number, because the mean of its divisors is an integer number (23640079680).

Almost surely, 2^685111150731 is an apocalyptic number.

685111150731 is a deficient number, since it is larger than the sum of its proper divisors (449612673909).

685111150731 is a wasteful number, since it uses less digits than its factorization.

685111150731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5184304 (or 5184297 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 39.

The spelling of 685111150731 in words is "six hundred eighty-five billion, one hundred eleven million, one hundred fifty thousand, seven hundred thirty-one".