681015594 has 32 divisors (see below), whose sum is σ = 1638535680. Its totient is φ = 184334832.

The previous prime is 681015557. The next prime is 681015641. The reversal of 681015594 is 495510186.

681015594 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 425904 + ... + 427499.

It is an arithmetic number, because the mean of its divisors is an integer number (51204240).

Almost surely, 2^681015594 is an apocalyptic number.

681015594 is an abundant number, since it is smaller than the sum of its proper divisors (957520086).

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

681015594 is a wasteful number, since it uses less digits than its factorization.

681015594 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 853434.

The product of its (nonzero) digits is 43200, while the sum is 39.

The square root of 681015594 is about 26096.2754813786. The cubic root of 681015594 is about 879.8035003752.

The spelling of 681015594 in words is "six hundred eighty-one million, fifteen thousand, five hundred ninety-four".