645703550283 has 32 divisors (see below), whose sum is σ = 954795389184. Its totient is φ = 384842160000.

The previous prime is 645703550279. The next prime is 645703550287. The reversal of 645703550283 is 382055307546.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (645703550279) and next prime (645703550287).

It is not a de Polignac number, because 645703550283 - 2² = 645703550279 is a prime.

It is not an unprimeable number, because it can be changed into a prime (645703550287) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10802148 + ... + 10861758.

It is an arithmetic number, because the mean of its divisors is an integer number (29837355912).

Almost surely, 2^645703550283 is an apocalyptic number.

645703550283 is a deficient number, since it is larger than the sum of its proper divisors (309091838901).

645703550283 is a wasteful number, since it uses less digits than its factorization.

645703550283 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65067.

The product of its (nonzero) digits is 3024000, while the sum is 48.

The spelling of 645703550283 in words is "six hundred forty-five billion, seven hundred three million, five hundred fifty thousand, two hundred eighty-three".