1815609342 has 16 divisors (see below), whose sum is σ = 3708479232. Its totient is φ = 592326360.

The previous prime is 1815609337. The next prime is 1815609343. The reversal of 1815609342 is 2439065181.

It is a self number, because there is not a number n which added to its sum of digits gives 1815609342.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1815609343) 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, 3218884 + ... + 3219447.

It is an arithmetic number, because the mean of its divisors is an integer number (231779952).

Almost surely, 2^1815609342 is an apocalyptic number.

1815609342 is an abundant number, since it is smaller than the sum of its proper divisors (1892869890).

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

1815609342 is a wasteful number, since it uses less digits than its factorization.

1815609342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6438383.

The product of its (nonzero) digits is 51840, while the sum is 39.

The square root of 1815609342 is about 42609.9676366927. The cubic root of 1815609342 is about 1219.9465492125.

The spelling of 1815609342 in words is "one billion, eight hundred fifteen million, six hundred nine thousand, three hundred forty-two".