725553771 has 8 divisors (see below), whose sum is σ = 967533120. Its totient is φ = 483638472.

The previous prime is 725553709. The next prime is 725553793. The reversal of 725553771 is 177355527.

It is a happy number.

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

It is not a de Polignac number, because 725553771 - 2⁶ = 725553707 is a prime.

It is a super-2 number, since 2×725553771² = 1052856549224640882, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (725553271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26700 + ... + 46518.

It is an arithmetic number, because the mean of its divisors is an integer number (120941640).

Almost surely, 2^725553771 is an apocalyptic number.

725553771 is a deficient number, since it is larger than the sum of its proper divisors (241979349).

725553771 is a wasteful number, since it uses less digits than its factorization.

725553771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32025.

The product of its digits is 257250, while the sum is 42.

The square root of 725553771 is about 26936.1053420869. The cubic root of 725553771 is about 898.5795581058.

The spelling of 725553771 in words is "seven hundred twenty-five million, five hundred fifty-three thousand, seven hundred seventy-one".