725251778 has 32 divisors (see below), whose sum is σ = 1185528960. Its totient is φ = 331703680.

The previous prime is 725251771. The next prime is 725251799. The reversal of 725251778 is 877152527.

It is a super-2 number, since 2×725251778² = 1051980282984322568, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (725251771) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 140198 + ... + 145278.

It is an arithmetic number, because the mean of its divisors is an integer number (37047780).

Almost surely, 2^725251778 is an apocalyptic number.

725251778 is a deficient number, since it is larger than the sum of its proper divisors (460277182).

725251778 is a wasteful number, since it uses less digits than its factorization.

725251778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5242.

The product of its digits is 274400, while the sum is 44.

The square root of 725251778 is about 26930.4990299103. The cubic root of 725251778 is about 898.4548706346.

The spelling of 725251778 in words is "seven hundred twenty-five million, two hundred fifty-one thousand, seven hundred seventy-eight".