645863014 has 8 divisors (see below), whose sum is σ = 1025782488. Its totient is φ = 303935520.

The previous prime is 645862993. The next prime is 645863027. The reversal of 645863014 is 410368546.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9497952 + ... + 9498019.

It is an arithmetic number, because the mean of its divisors is an integer number (128222811).

Almost surely, 2^645863014 is an apocalyptic number.

645863014 is a deficient number, since it is larger than the sum of its proper divisors (379919474).

645863014 is a wasteful number, since it uses less digits than its factorization.

645863014 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18995990.

The product of its (nonzero) digits is 69120, while the sum is 37.

The square root of 645863014 is about 25413.8350903597. The cubic root of 645863014 is about 864.3974392853.

It can be divided in two parts, 64586 and 3014, that added together give a square (67600 = 260²).

The spelling of 645863014 in words is "six hundred forty-five million, eight hundred sixty-three thousand, fourteen".