645735041 has 8 divisors (see below), whose sum is σ = 742871424. Its totient is φ = 549820800.

The previous prime is 645735037. The next prime is 645735047. The reversal of 645735041 is 140537546.

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 645735041 - 2² = 645735037 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 645734992 and 645735010.

It is not an unprimeable number, because it can be changed into a prime (645735047) by changing a digit.

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, 304400 + ... + 306513.

It is an arithmetic number, because the mean of its divisors is an integer number (92858928).

Almost surely, 2^645735041 is an apocalyptic number.

It is an amenable number.

645735041 is a deficient number, since it is larger than the sum of its proper divisors (97136383).

645735041 is a wasteful number, since it uses less digits than its factorization.

645735041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611071.

The product of its (nonzero) digits is 50400, while the sum is 35.

The square root of 645735041 is about 25411.3171834913. The cubic root of 645735041 is about 864.3403441851.

The spelling of 645735041 in words is "six hundred forty-five million, seven hundred thirty-five thousand, forty-one".