645446312562 has 32 divisors (see below), whose sum is σ = 1306829242368. Its totient is φ = 212503577616.

The previous prime is 645446312461. The next prime is 645446312569. The reversal of 645446312562 is 265213644546.

It is not an unprimeable number, because it can be changed into a prime (645446312569) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1126768 + ... + 1600155.

It is an arithmetic number, because the mean of its divisors is an integer number (40838413824).

Almost surely, 2^645446312562 is an apocalyptic number.

645446312562 is an abundant number, since it is smaller than the sum of its proper divisors (661382929806).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

645446312562 is a wasteful number, since it uses less digits than its factorization.

645446312562 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2727414.

The product of its digits is 4147200, while the sum is 48.

The spelling of 645446312562 in words is "six hundred forty-five billion, four hundred forty-six million, three hundred twelve thousand, five hundred sixty-two".