645010547 has 8 divisors (see below), whose sum is σ = 667913040. Its totient is φ = 622152160.

The previous prime is 645010507. The next prime is 645010567. The reversal of 645010547 is 745010546.

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 645010547 - 2¹⁶ = 644945011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (645010507) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20288 + ... + 41250.

It is an arithmetic number, because the mean of its divisors is an integer number (83489130).

Almost surely, 2^645010547 is an apocalyptic number.

645010547 is a deficient number, since it is larger than the sum of its proper divisors (22902493).

645010547 is a wasteful number, since it uses less digits than its factorization.

645010547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22053.

The product of its (nonzero) digits is 16800, while the sum is 32.

The square root of 645010547 is about 25397.0578414115. The cubic root of 645010547 is about 864.0169691705.

Subtracting 645010547 from its reverse (745010546), we obtain a palindrome (99999999).

The spelling of 645010547 in words is "six hundred forty-five million, ten thousand, five hundred forty-seven".