644414835328030 has 32 divisors (see below), whose sum is σ = 1303485258890304. Its totient is φ = 227592664248576.

The previous prime is 644414835328001. The next prime is 644414835328079. The reversal of 644414835328030 is 30823538414446.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 107761675159 + ... + 107761681138.

It is an arithmetic number, because the mean of its divisors is an integer number (40733914340322).

Almost surely, 2^{644414835328030} is an apocalyptic number.

644414835328030 is an abundant number, since it is smaller than the sum of its proper divisors (659070423562274).

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

644414835328030 is a wasteful number, since it uses less digits than its factorization.

644414835328030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215523356340.

The product of its (nonzero) digits is 26542080, while the sum is 55.

The spelling of 644414835328030 in words is "six hundred forty-four trillion, four hundred fourteen billion, eight hundred thirty-five million, three hundred twenty-eight thousand, thirty".