609730191440 has 40 divisors (see below), whose sum is σ = 1417867313928. Its totient is φ = 243849991680.

The previous prime is 609730191439. The next prime is 609730191451. The reversal of 609730191440 is 44191037906.

It can be written as a sum of positive squares in 4 ways, for example, as 282505006144 + 327225185296 = 531512^2 + 572036^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 609730191391 and 609730191400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 188987 + ... + 1120346.

Almost surely, 2^609730191440 is an apocalyptic number.

It is an amenable number.

609730191440 is an abundant number, since it is smaller than the sum of its proper divisors (808137122488).

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

609730191440 is a wasteful number, since it uses less digits than its factorization.

609730191440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1315167 (or 1315161 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 44.

The spelling of 609730191440 in words is "six hundred nine billion, seven hundred thirty million, one hundred ninety-one thousand, four hundred forty".