685709909626 has 32 divisors (see below), whose sum is σ = 1187250878592. Its totient is φ = 290939169600.

The previous prime is 685709909587. The next prime is 685709909627. The reversal of 685709909626 is 626909907586.

It is not an unprimeable number, because it can be changed into a prime (685709909627) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26042620 + ... + 26068936.

It is an arithmetic number, because the mean of its divisors is an integer number (37101589956).

Almost surely, 2^685709909626 is an apocalyptic number.

685709909626 is a deficient number, since it is larger than the sum of its proper divisors (501540968966).

685709909626 is a wasteful number, since it uses less digits than its factorization.

685709909626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44854.

The product of its (nonzero) digits is 88179840, while the sum is 67.

The spelling of 685709909626 in words is "six hundred eighty-five billion, seven hundred nine million, nine hundred nine thousand, six hundred twenty-six".