425516645 has 4 divisors (see below), whose sum is σ = 510619980. Its totient is φ = 340413312.

The previous prime is 425516639. The next prime is 425516653. The reversal of 425516645 is 546615524.

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

It can be written as a sum of positive squares in 2 ways, for example, as 338486404 + 87030241 = 18398^2 + 9329^2 .

It is a cyclic number.

It is not a de Polignac number, because 425516645 - 2⁸ = 425516389 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 425516599 and 425516608.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 42551660 + ... + 42551669.

It is an arithmetic number, because the mean of its divisors is an integer number (127654995).

Almost surely, 2^425516645 is an apocalyptic number.

It is an amenable number.

425516645 is a deficient number, since it is larger than the sum of its proper divisors (85103335).

425516645 is an equidigital number, since it uses as much as digits as its factorization.

425516645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85103334.

The product of its digits is 144000, while the sum is 38.

The square root of 425516645 is about 20628.0548040769. The cubic root of 425516645 is about 752.1518321055.

The spelling of 425516645 in words is "four hundred twenty-five million, five hundred sixteen thousand, six hundred forty-five".