645416464134 has 32 divisors (see below), whose sum is σ = 1463292391680. Its totient is φ = 188137592352.

The previous prime is 645416464127. The next prime is 645416464151. The reversal of 645416464134 is 431464614546.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 217750362 + ... + 217753325.

It is an arithmetic number, because the mean of its divisors is an integer number (45727887240).

Almost surely, 2^645416464134 is an apocalyptic number.

645416464134 is an abundant number, since it is smaller than the sum of its proper divisors (817875927546).

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

645416464134 is a wasteful number, since it uses less digits than its factorization.

645416464134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435503724.

The product of its digits is 3317760, while the sum is 48.

The spelling of 645416464134 in words is "six hundred forty-five billion, four hundred sixteen million, four hundred sixty-four thousand, one hundred thirty-four".