425644559 has 4 divisors (see below), whose sum is σ = 437148504. Its totient is φ = 414140616.

The previous prime is 425644543. The next prime is 425644567. The reversal of 425644559 is 955446524.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 425644559 - 2⁴ = 425644543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (425644159) 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, 5751917 + ... + 5751990.

It is an arithmetic number, because the mean of its divisors is an integer number (109287126).

Almost surely, 2^425644559 is an apocalyptic number.

425644559 is a deficient number, since it is larger than the sum of its proper divisors (11503945).

425644559 is a wasteful number, since it uses less digits than its factorization.

425644559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11503944.

The product of its digits is 864000, while the sum is 44.

The square root of 425644559 is about 20631.1550573399. The cubic root of 425644559 is about 752.2271923463.

The spelling of 425644559 in words is "four hundred twenty-five million, six hundred forty-four thousand, five hundred fifty-nine".