645156614774 has 24 divisors (see below), whose sum is σ = 1126150014600. Its totient is φ = 276393134976.

The previous prime is 645156614747. The next prime is 645156614797. The reversal of 645156614774 is 477416651546.

645156614774 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 955067 + ... + 1484070.

It is an arithmetic number, because the mean of its divisors is an integer number (46922917275).

Almost surely, 2^645156614774 is an apocalyptic number.

645156614774 is a deficient number, since it is larger than the sum of its proper divisors (480993399826).

645156614774 is a wasteful number, since it uses less digits than its factorization.

645156614774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2441852 (or 2441845 counting only the distinct ones).

The product of its digits is 16934400, while the sum is 56.

The spelling of 645156614774 in words is "six hundred forty-five billion, one hundred fifty-six million, six hundred fourteen thousand, seven hundred seventy-four".