659990081488 has 20 divisors (see below), whose sum is σ = 1322824948740. Its totient is φ = 318615901184.

The previous prime is 659990081479. The next prime is 659990081489. The reversal of 659990081488 is 884180099956.

It can be written as a sum of positive squares in 2 ways, for example, as 266825968704 + 393164112784 = 516552^2 + 627028^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (659990081489) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 711195745 + ... + 711196672.

It is an arithmetic number, because the mean of its divisors is an integer number (66141247437).

Almost surely, 2^659990081488 is an apocalyptic number.

It is an amenable number.

659990081488 is an abundant number, since it is smaller than the sum of its proper divisors (662834867252).

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

659990081488 is a wasteful number, since it uses less digits than its factorization.

659990081488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1422392454 (or 1422392448 counting only the distinct ones).

The product of its (nonzero) digits is 44789760, while the sum is 67.

The spelling of 659990081488 in words is "six hundred fifty-nine billion, nine hundred ninety million, eighty-one thousand, four hundred eighty-eight".