1661060553850 has 48 divisors (see below), whose sum is σ = 3121695957600. Its totient is φ = 657530758080.

The previous prime is 1661060553839. The next prime is 1661060553931. The reversal of 1661060553850 is 583550601661.

It is a self number, because there is not a number n which added to its sum of digits gives 1661060553850.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4322881 + ... + 4691419.

It is an arithmetic number, because the mean of its divisors is an integer number (65035332450).

Almost surely, 2^{1661060553850} is an apocalyptic number.

1661060553850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1661060553850 is a deficient number, since it is larger than the sum of its proper divisors (1460635403750).

1661060553850 is a wasteful number, since it uses less digits than its factorization.

1661060553850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 369487 (or 369482 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 46.

The spelling of 1661060553850 in words is "one trillion, six hundred sixty-one billion, sixty million, five hundred fifty-three thousand, eight hundred fifty".