645302384157 has 4 divisors (see below), whose sum is σ = 860403178880. Its totient is φ = 430201589436.

The previous prime is 645302384143. The next prime is 645302384161. The reversal of 645302384157 is 751483203546.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 645302384157 - 2¹⁵ = 645302351389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645302380157) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 107550397357 + ... + 107550397362.

It is an arithmetic number, because the mean of its divisors is an integer number (215100794720).

Almost surely, 2^645302384157 is an apocalyptic number.

It is an amenable number.

645302384157 is a deficient number, since it is larger than the sum of its proper divisors (215100794723).

645302384157 is a wasteful number, since it uses less digits than its factorization.

645302384157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215100794722.

The product of its (nonzero) digits is 2419200, while the sum is 48.

The spelling of 645302384157 in words is "six hundred forty-five billion, three hundred two million, three hundred eighty-four thousand, one hundred fifty-seven".