645794827 has 8 divisors (see below), whose sum is σ = 684736416. Its totient is φ = 606959232.

The previous prime is 645794803. The next prime is 645794839. The reversal of 645794827 is 728497546.

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 645794827 - 2¹¹ = 645792779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (645794867) 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, 13768 + ... + 38485.

It is an arithmetic number, because the mean of its divisors is an integer number (85592052).

Almost surely, 2^645794827 is an apocalyptic number.

645794827 is a deficient number, since it is larger than the sum of its proper divisors (38941589).

645794827 is a wasteful number, since it uses less digits than its factorization.

645794827 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52997.

The product of its digits is 3386880, while the sum is 52.

The square root of 645794827 is about 25412.4935218880. The cubic root of 645794827 is about 864.3670186227.

The spelling of 645794827 in words is "six hundred forty-five million, seven hundred ninety-four thousand, eight hundred twenty-seven".