725711978 has 8 divisors (see below), whose sum is σ = 1088760420. Its totient is φ = 362791840.

The previous prime is 725711971. The next prime is 725712017. The reversal of 725711978 is 879117527.

725711978 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 615188809 + 110523169 = 24803^2 + 10513^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (725711971) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16403 + ... + 41478.

Almost surely, 2^725711978 is an apocalyptic number.

725711978 is a deficient number, since it is larger than the sum of its proper divisors (363048442).

725711978 is a wasteful number, since it uses less digits than its factorization.

725711978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64152.

The product of its digits is 246960, while the sum is 47.

The square root of 725711978 is about 26939.0418909062. The cubic root of 725711978 is about 898.6448651169.

The spelling of 725711978 in words is "seven hundred twenty-five million, seven hundred eleven thousand, nine hundred seventy-eight".