644117622241125 has 64 divisors (see below), whose sum is σ = 1128640915584000. Its totient is φ = 325328312865600.

The previous prime is 644117622241081. The next prime is 644117622241127. The reversal of 644117622241125 is 521142226711446.

It is not a de Polignac number, because 644117622241125 - 2¹² = 644117622237029 is a prime.

It is a super-2 number, since 2×644117622241125² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (644117622241127) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2482974 + ... + 35977776.

It is an arithmetic number, because the mean of its divisors is an integer number (17635014306000).

Almost surely, 2^{644117622241125} is an apocalyptic number.

It is an amenable number.

644117622241125 is a deficient number, since it is larger than the sum of its proper divisors (484523293342875).

644117622241125 is a wasteful number, since it uses less digits than its factorization.

644117622241125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33497539 (or 33497529 counting only the distinct ones).

The product of its digits is 1290240, while the sum is 48.

The spelling of 644117622241125 in words is "six hundred forty-four trillion, one hundred seventeen billion, six hundred twenty-two million, two hundred forty-one thousand, one hundred twenty-five".