659544145920 has 952 divisors, whose sum is σ = 2599320380832. Its totient is φ = 159252480000.

The previous prime is 659544145901. The next prime is 659544145921. The reversal of 659544145920 is 29541445956.

It is a happy number.

659544145920 is a `hidden beast` number, since 6 + 5 + 9 + 5 + 4 + 41 + 4 + 592 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (659544145921) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 2627665795 + ... + 2627666045.

Almost surely, 2^659544145920 is an apocalyptic number.

659544145920 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 659544145920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1299660190416).

659544145920 is an abundant number, since it is smaller than the sum of its proper divisors (1939776234912).

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

659544145920 is an frugal number, since it uses more digits than its factorization.

659544145920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317 (or 272 counting only the distinct ones).

The product of its (nonzero) digits is 7776000, while the sum is 54.

The spelling of 659544145920 in words is "six hundred fifty-nine billion, five hundred forty-four million, one hundred forty-five thousand, nine hundred twenty".