1201820775730 has 16 divisors (see below), whose sum is σ = 2198740961304. Its totient is φ = 472847518080.

The previous prime is 1201820775721. The next prime is 1201820775839. The reversal of 1201820775730 is 375770281021.

It can be written as a sum of positive squares in 4 ways, for example, as 482715079729 + 719105696001 = 694777^2 + 848001^2 .

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, 985098387 + ... + 985099606.

Almost surely, 2^{1201820775730} is an apocalyptic number.

1201820775730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1201820775730 is a deficient number, since it is larger than the sum of its proper divisors (996920185574).

1201820775730 is a wasteful number, since it uses less digits than its factorization.

1201820775730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1970198061.

The product of its (nonzero) digits is 164640, while the sum is 43.

The spelling of 1201820775730 in words is "one trillion, two hundred one billion, eight hundred twenty million, seven hundred seventy-five thousand, seven hundred thirty".