609618642 has 8 divisors (see below), whose sum is σ = 1219237296. Its totient is φ = 203206212.

The previous prime is 609618619. The next prime is 609618643. The reversal of 609618642 is 246816906.

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

609618642 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 609618594 and 609618603.

It is not an unprimeable number, because it can be changed into a prime (609618643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50801548 + ... + 50801559.

It is an arithmetic number, because the mean of its divisors is an integer number (152404662).

Almost surely, 2^609618642 is an apocalyptic number.

609618642 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

609618642 is a wasteful number, since it uses less digits than its factorization.

609618642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101603112.

The product of its (nonzero) digits is 124416, while the sum is 42.

The square root of 609618642 is about 24690.4564963874. The cubic root of 609618642 is about 847.9158359940.

The spelling of 609618642 in words is "six hundred nine million, six hundred eighteen thousand, six hundred forty-two".