685052352737 has 4 divisors (see below), whose sum is σ = 685164058260. Its totient is φ = 684940647216.

The previous prime is 685052352703. The next prime is 685052352773. The reversal of 685052352737 is 737253250586.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 737253250586 = 2 ⋅368626625293.

It can be written as a sum of positive squares in 2 ways, for example, as 423240023761 + 261812328976 = 650569^2 + 511676^2 .

It is a cyclic number.

It is not a de Polignac number, because 685052352737 - 2²⁸ = 684783917281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (685052352797) 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, 55843562 + ... + 55855827.

It is an arithmetic number, because the mean of its divisors is an integer number (171291014565).

Almost surely, 2^685052352737 is an apocalyptic number.

It is an amenable number.

685052352737 is a deficient number, since it is larger than the sum of its proper divisors (111705523).

685052352737 is a wasteful number, since it uses less digits than its factorization.

685052352737 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111705522.

The product of its (nonzero) digits is 10584000, while the sum is 53.

It can be divided in two parts, 68505 and 2352737, that added together give a palindrome (2421242).

The spelling of 685052352737 in words is "six hundred eighty-five billion, fifty-two million, three hundred fifty-two thousand, seven hundred thirty-seven".