645468717586 has 64 divisors (see below), whose sum is σ = 1218665352960. Its totient is φ = 249075855360.

The previous prime is 645468717583. The next prime is 645468717599. The reversal of 645468717586 is 685717864546.

It is not an unprimeable number, because it can be changed into a prime (645468717583) 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, 53994586 + ... + 54006538.

It is an arithmetic number, because the mean of its divisors is an integer number (19041646140).

Almost surely, 2^645468717586 is an apocalyptic number.

645468717586 is a deficient number, since it is larger than the sum of its proper divisors (573196635374).

645468717586 is a wasteful number, since it uses less digits than its factorization.

645468717586 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15299.

The product of its digits is 270950400, while the sum is 67.

The spelling of 645468717586 in words is "six hundred forty-five billion, four hundred sixty-eight million, seven hundred seventeen thousand, five hundred eighty-six".