685563693502 has 8 divisors (see below), whose sum is σ = 1082468989800. Its totient is φ = 324740696904.

The previous prime is 685563693491. The next prime is 685563693509. The reversal of 685563693502 is 205396365586.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685563693509) 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, 9020574877 + ... + 9020574952.

It is an arithmetic number, because the mean of its divisors is an integer number (135308623725).

Almost surely, 2^685563693502 is an apocalyptic number.

685563693502 is a deficient number, since it is larger than the sum of its proper divisors (396905296298).

685563693502 is a wasteful number, since it uses less digits than its factorization.

685563693502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18041149850.

The product of its (nonzero) digits is 34992000, while the sum is 58.

The spelling of 685563693502 in words is "six hundred eighty-five billion, five hundred sixty-three million, six hundred ninety-three thousand, five hundred two".