680957654654 has 4 divisors (see below), whose sum is σ = 1021436481984. Its totient is φ = 340478827326.

The previous prime is 680957654651. The next prime is 680957654683. The reversal of 680957654654 is 456456759086.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680957654651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170239413662 + ... + 170239413665.

It is an arithmetic number, because the mean of its divisors is an integer number (255359120496).

Almost surely, 2^680957654654 is an apocalyptic number.

680957654654 is a deficient number, since it is larger than the sum of its proper divisors (340478827330).

680957654654 is a wasteful number, since it uses less digits than its factorization.

680957654654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340478827329.

The product of its (nonzero) digits is 217728000, while the sum is 65.

The spelling of 680957654654 in words is "six hundred eighty billion, nine hundred fifty-seven million, six hundred fifty-four thousand, six hundred fifty-four".