609464222640 has 720 divisors, whose sum is σ = 2626723191456. Its totient is φ = 125450035200.

The previous prime is 609464222597. The next prime is 609464222687. The reversal of 609464222640 is 46222464906.

It is a tau number, because it is divible by the number of its divisors (720).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 18788035 + ... + 18820445.

Almost surely, 2^609464222640 is an apocalyptic number.

609464222640 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 609464222640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1313361595728).

609464222640 is an abundant number, since it is smaller than the sum of its proper divisors (2017258968816).

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

609464222640 is a wasteful number, since it uses less digits than its factorization.

609464222640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32498 (or 32482 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 45.

The spelling of 609464222640 in words is "six hundred nine billion, four hundred sixty-four million, two hundred twenty-two thousand, six hundred forty".