645477134 has 4 divisors (see below), whose sum is σ = 968215704. Its totient is φ = 322738566.

The previous prime is 645477121. The next prime is 645477167. The reversal of 645477134 is 431774546.

645477134 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 645477091 and 645477100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 161369282 + ... + 161369285.

It is an arithmetic number, because the mean of its divisors is an integer number (242053926).

Almost surely, 2^645477134 is an apocalyptic number.

645477134 is a deficient number, since it is larger than the sum of its proper divisors (322738570).

645477134 is a wasteful number, since it uses less digits than its factorization.

645477134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322738569.

The product of its digits is 282240, while the sum is 41.

The square root of 645477134 is about 25406.2420282890. The cubic root of 645477134 is about 864.2252561611.

The spelling of 645477134 in words is "six hundred forty-five million, four hundred seventy-seven thousand, one hundred thirty-four".