1861650842 has 16 divisors (see below), whose sum is σ = 2820565152. Its totient is φ = 921474960.

The previous prime is 1861650839. The next prime is 1861650877. The reversal of 1861650842 is 2480561681.

It is a self number, because there is not a number n which added to its sum of digits gives 1861650842.

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, 471617 + ... + 475547.

It is an arithmetic number, because the mean of its divisors is an integer number (176285322).

Almost surely, 2^1861650842 is an apocalyptic number.

1861650842 is a deficient number, since it is larger than the sum of its proper divisors (958914310).

1861650842 is a wasteful number, since it uses less digits than its factorization.

1861650842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6253.

The product of its (nonzero) digits is 92160, while the sum is 41.

The square root of 1861650842 is about 43146.8520520327. The cubic root of 1861650842 is about 1230.1726776319.

The spelling of 1861650842 in words is "one billion, eight hundred sixty-one million, six hundred fifty thousand, eight hundred forty-two".