609286909440 has 640 divisors, whose sum is σ = 2165415690240. Its totient is φ = 144919756800.

The previous prime is 609286909433. The next prime is 609286909471. The reversal of 609286909440 is 44909682906.

It is a tau number, because it is divible by the number of its divisors (640).

It is a super-2 number, since 2×609286909440² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1169456380 + ... + 1169456900.

It is an arithmetic number, because the mean of its divisors is an integer number (3383462016).

Almost surely, 2^609286909440 is an apocalyptic number.

609286909440 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 609286909440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1082707845120).

609286909440 is an abundant number, since it is smaller than the sum of its proper divisors (1556128780800).

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

609286909440 is a wasteful number, since it uses less digits than its factorization.

609286909440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 794 (or 778 counting only the distinct ones).

The product of its (nonzero) digits is 6718464, while the sum is 57.

The spelling of 609286909440 in words is "six hundred nine billion, two hundred eighty-six million, nine hundred nine thousand, four hundred forty".