645970486 has 16 divisors (see below), whose sum is σ = 1113003936. Its totient is φ = 275438016.

The previous prime is 645970483. The next prime is 645970487. The reversal of 645970486 is 684079546.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645970483) 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, 114351 + ... + 119866.

It is an arithmetic number, because the mean of its divisors is an integer number (69562746).

Almost surely, 2^645970486 is an apocalyptic number.

645970486 is a deficient number, since it is larger than the sum of its proper divisors (467033450).

645970486 is a wasteful number, since it uses less digits than its factorization.

645970486 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234423.

The product of its (nonzero) digits is 1451520, while the sum is 49.

The square root of 645970486 is about 25415.9494412465. The cubic root of 645970486 is about 864.4453820468.

The spelling of 645970486 in words is "six hundred forty-five million, nine hundred seventy thousand, four hundred eighty-six".