681178902 has 16 divisors (see below), whose sum is σ = 1421591040. Its totient is φ = 217187432.

The previous prime is 681178891. The next prime is 681178907. The reversal of 681178902 is 209871186.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681178907) 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, 2467902 + ... + 2468177.

It is an arithmetic number, because the mean of its divisors is an integer number (88849440).

Almost surely, 2^681178902 is an apocalyptic number.

681178902 is an abundant number, since it is smaller than the sum of its proper divisors (740412138).

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

681178902 is a wasteful number, since it uses less digits than its factorization.

681178902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4936107.

The product of its (nonzero) digits is 48384, while the sum is 42.

The square root of 681178902 is about 26099.4042460743. The cubic root of 681178902 is about 879.8738205793.

The spelling of 681178902 in words is "six hundred eighty-one million, one hundred seventy-eight thousand, nine hundred two".