725456103581 has 4 divisors (see below), whose sum is σ = 791406658464. Its totient is φ = 659505548700.

The previous prime is 725456103577. The next prime is 725456103637. The reversal of 725456103581 is 185301654527.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 725456103581 - 2² = 725456103577 is a prime.

It is a super-2 number, since 2×725456103581² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (725456103511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32975277425 + ... + 32975277446.

It is an arithmetic number, because the mean of its divisors is an integer number (197851664616).

Almost surely, 2^725456103581 is an apocalyptic number.

It is an amenable number.

725456103581 is a deficient number, since it is larger than the sum of its proper divisors (65950554883).

725456103581 is a wasteful number, since it uses less digits than its factorization.

725456103581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65950554882.

The product of its (nonzero) digits is 1008000, while the sum is 47.

The spelling of 725456103581 in words is "seven hundred twenty-five billion, four hundred fifty-six million, one hundred three thousand, five hundred eighty-one".