609902161919 has 4 divisors (see below), whose sum is σ = 609926190720. Its totient is φ = 609878133120.

The previous prime is 609902161909. The next prime is 609902161931. The reversal of 609902161919 is 919161209906.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 609902161919 - 2¹⁶ = 609902096383 is a prime.

It is a super-2 number, since 2×609902161919² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (609902161909) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 11976287 + ... + 12027104.

It is an arithmetic number, because the mean of its divisors is an integer number (152481547680).

Almost surely, 2^609902161919 is an apocalyptic number.

609902161919 is a deficient number, since it is larger than the sum of its proper divisors (24028801).

609902161919 is a wasteful number, since it uses less digits than its factorization.

609902161919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24028800.

The product of its (nonzero) digits is 472392, while the sum is 53.

The spelling of 609902161919 in words is "six hundred nine billion, nine hundred two million, one hundred sixty-one thousand, nine hundred nineteen".