664562438112 has 96 divisors (see below), whose sum is σ = 1791888430752. Its totient is φ = 215502004224.

The previous prime is 664562438077. The next prime is 664562438117. The reversal of 664562438112 is 211834265466.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-3 number, since 3×664562438112³ (a number of 36 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664562438117) 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, 42875548 + ... + 42891044.

It is an arithmetic number, because the mean of its divisors is an integer number (18665504487).

Almost surely, 2^664562438112 is an apocalyptic number.

It is an amenable number.

664562438112 is an abundant number, since it is smaller than the sum of its proper divisors (1127325992640).

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

664562438112 is a wasteful number, since it uses less digits than its factorization.

664562438112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27620 (or 27612 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 48.

The spelling of 664562438112 in words is "six hundred sixty-four billion, five hundred sixty-two million, four hundred thirty-eight thousand, one hundred twelve".