609521769700991 has 8 divisors (see below), whose sum is σ = 697533853737984. Its totient is φ = 521744072041080.

The previous prime is 609521769700933. The next prime is 609521769701003. The reversal of 609521769700991 is 199007967125906.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 609521769700991 - 2¹⁰ = 609521769699967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (609521769700691) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58596588695 + ... + 58596599096.

It is an arithmetic number, because the mean of its divisors is an integer number (87191731717248).

Almost surely, 2^{609521769700991} is an apocalyptic number.

609521769700991 is a deficient number, since it is larger than the sum of its proper divisors (88012084036993).

609521769700991 is a wasteful number, since it uses less digits than its factorization.

609521769700991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117193188541.

The product of its (nonzero) digits is 115736040, while the sum is 71.

The spelling of 609521769700991 in words is "six hundred nine trillion, five hundred twenty-one billion, seven hundred sixty-nine million, seven hundred thousand, nine hundred ninety-one".