681320154 has 16 divisors (see below), whose sum is σ = 1371666240. Its totient is φ = 225602400.

The previous prime is 681320153. The next prime is 681320161. The reversal of 681320154 is 451023186.

681320154 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (681320153) 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, 375099 + ... + 376910.

It is an arithmetic number, because the mean of its divisors is an integer number (85729140).

Almost surely, 2^681320154 is an apocalyptic number.

681320154 is an abundant number, since it is smaller than the sum of its proper divisors (690346086).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

681320154 is a wasteful number, since it uses less digits than its factorization.

681320154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 752165.

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 681320154 is about 26102.1101445841. The cubic root of 681320154 is about 879.9346344355.

The spelling of 681320154 in words is "six hundred eighty-one million, three hundred twenty thousand, one hundred fifty-four".