1861204630650 has 24 divisors (see below), whose sum is σ = 4615787484384. Its totient is φ = 496321234800.

The previous prime is 1861204630639. The next prime is 1861204630679. The reversal of 1861204630650 is 560364021681.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6204015286 + ... + 6204015585.

It is an arithmetic number, because the mean of its divisors is an integer number (192324478516).

Almost surely, 2^{1861204630650} is an apocalyptic number.

1861204630650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1861204630650 is an abundant number, since it is smaller than the sum of its proper divisors (2754582853734).

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

1861204630650 is a wasteful number, since it uses less digits than its factorization.

1861204630650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12408030886 (or 12408030881 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 42.

The spelling of 1861204630650 in words is "one trillion, eight hundred sixty-one billion, two hundred four million, six hundred thirty thousand, six hundred fifty".