680154808 has 8 divisors (see below), whose sum is σ = 1275290280. Its totient is φ = 340077400.

The previous prime is 680154793. The next prime is 680154817. The reversal of 680154808 is 808451086.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×680154808² = 925221125691033728, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42509668 + ... + 42509683.

It is an arithmetic number, because the mean of its divisors is an integer number (159411285).

Almost surely, 2^680154808 is an apocalyptic number.

It is an amenable number.

680154808 is a deficient number, since it is larger than the sum of its proper divisors (595135472).

680154808 is a wasteful number, since it uses less digits than its factorization.

680154808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85019357 (or 85019353 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 40.

The square root of 680154808 is about 26079.7777597893. Note that the first 4 decimals coincide. The cubic root of 680154808 is about 879.4326611729.

The spelling of 680154808 in words is "six hundred eighty million, one hundred fifty-four thousand, eight hundred eight".