644601020414 has 32 divisors (see below), whose sum is σ = 1051225620480. Its totient is φ = 294667291872.

The previous prime is 644601020333. The next prime is 644601020419. The reversal of 644601020414 is 414020106446.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (644601020419) 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, 15332867 + ... + 15374849.

It is an arithmetic number, because the mean of its divisors is an integer number (32850800640).

Almost surely, 2^644601020414 is an apocalyptic number.

644601020414 is a deficient number, since it is larger than the sum of its proper divisors (406624600066).

644601020414 is a wasteful number, since it uses less digits than its factorization.

644601020414 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47624.

The product of its (nonzero) digits is 18432, while the sum is 32.

The spelling of 644601020414 in words is "six hundred forty-four billion, six hundred one million, twenty thousand, four hundred fourteen".