645650207015 has 32 divisors (see below), whose sum is σ = 869993006400. Its totient is φ = 455854694400.

The previous prime is 645650207011. The next prime is 645650207021. The reversal of 645650207015 is 510702056546.

It is not a de Polignac number, because 645650207015 - 2² = 645650207011 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645650207011) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 560405 + ... + 1267025.

It is an arithmetic number, because the mean of its divisors is an integer number (27187281450).

Almost surely, 2^645650207015 is an apocalyptic number.

645650207015 is a deficient number, since it is larger than the sum of its proper divisors (224342799385).

645650207015 is a wasteful number, since it uses less digits than its factorization.

645650207015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 707123.

The product of its (nonzero) digits is 252000, while the sum is 41.

The spelling of 645650207015 in words is "six hundred forty-five billion, six hundred fifty million, two hundred seven thousand, fifteen".