644414141414446 has 16 divisors (see below), whose sum is σ = 1043096805456048. Its totient is φ = 296816164142400.

The previous prime is 644414141414431. The next prime is 644414141414447.

644414141414446 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 644414141414393 and 644414141414402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (644414141414447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25239456975 + ... + 25239482506.

It is an arithmetic number, because the mean of its divisors is an integer number (65193550341003).

Almost surely, 2^{644414141414446} is an apocalyptic number.

644414141414446 is a deficient number, since it is larger than the sum of its proper divisors (398682664041602).

644414141414446 is a wasteful number, since it uses less digits than its factorization.

644414141414446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50478939987.

The product of its digits is 9437184, while the sum is 52.

The spelling of 644414141414446 in words is "six hundred forty-four trillion, four hundred fourteen billion, one hundred forty-one million, four hundred fourteen thousand, four hundred forty-six".