684996805742 has 16 divisors (see below), whose sum is σ = 1039407908400. Its totient is φ = 338541762048.

The previous prime is 684996805741. The next prime is 684996805769. The reversal of 684996805742 is 247508699486.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684996805741) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3468413 + ... + 3660584.

It is an arithmetic number, because the mean of its divisors is an integer number (64962994275).

Almost surely, 2^684996805742 is an apocalyptic number.

684996805742 is a deficient number, since it is larger than the sum of its proper divisors (354411102658).

684996805742 is a wasteful number, since it uses less digits than its factorization.

684996805742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7129555.

The product of its (nonzero) digits is 209018880, while the sum is 68.

The spelling of 684996805742 in words is "six hundred eighty-four billion, nine hundred ninety-six million, eight hundred five thousand, seven hundred forty-two".