644115114734 has 32 divisors (see below), whose sum is σ = 1192728262656. Its totient is φ = 254044913760.

The previous prime is 644115114733. The next prime is 644115114787. The reversal of 644115114734 is 437411511446.

644115114734 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 644115114691 and 644115114700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (644115114733) 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, 5285822 + ... + 5406305.

It is an arithmetic number, because the mean of its divisors is an integer number (37272758208).

Almost surely, 2^644115114734 is an apocalyptic number.

644115114734 is a deficient number, since it is larger than the sum of its proper divisors (548613147922).

644115114734 is a wasteful number, since it uses less digits than its factorization.

644115114734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10692480.

The product of its digits is 161280, while the sum is 41.

The spelling of 644115114734 in words is "six hundred forty-four billion, one hundred fifteen million, one hundred fourteen thousand, seven hundred thirty-four".