646134545 has 8 divisors (see below), whose sum is σ = 886127424. Its totient is φ = 443063664.

The previous prime is 646134527. The next prime is 646134551. The reversal of 646134545 is 545431646.

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

It is a cyclic number.

It is not a de Polignac number, because 646134545 - 2¹⁶ = 646069009 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 646134499 and 646134508.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9230459 + ... + 9230528.

It is an arithmetic number, because the mean of its divisors is an integer number (110765928).

Almost surely, 2^646134545 is an apocalyptic number.

It is an amenable number.

646134545 is a deficient number, since it is larger than the sum of its proper divisors (239992879).

646134545 is a wasteful number, since it uses less digits than its factorization.

646134545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18460999.

The product of its digits is 172800, while the sum is 38.

The square root of 646134545 is about 25419.1767175886. The cubic root of 646134545 is about 864.5185577535.

The spelling of 646134545 in words is "six hundred forty-six million, one hundred thirty-four thousand, five hundred forty-five".