425616909 has 16 divisors (see below), whose sum is σ = 597921792. Its totient is φ = 268768368.

The previous prime is 425616907. The next prime is 425616923. The reversal of 425616909 is 909616524.

It is a happy number.

It is not a de Polignac number, because 425616909 - 2¹ = 425616907 is a prime.

It is a super-2 number, since 2×425616909² = 362299506453428562, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (425616901) 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, 22837 + ... + 37050.

It is an arithmetic number, because the mean of its divisors is an integer number (37370112).

Almost surely, 2^425616909 is an apocalyptic number.

It is an amenable number.

425616909 is a deficient number, since it is larger than the sum of its proper divisors (172304883).

425616909 is a wasteful number, since it uses less digits than its factorization.

425616909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60016.

The product of its (nonzero) digits is 116640, while the sum is 42.

The square root of 425616909 is about 20630.4849434035. The cubic root of 425616909 is about 752.2109036912.

The spelling of 425616909 in words is "four hundred twenty-five million, six hundred sixteen thousand, nine hundred nine".