1901601605993 has 2 divisors, whose sum is σ = 1901601605994. Its totient is φ = 1901601605992.

The previous prime is 1901601605987. The next prime is 1901601605999. The reversal of 1901601605993 is 3995061061091.

It is a balanced prime because it is at equal distance from previous prime (1901601605987) and next prime (1901601605999).

It can be written as a sum of positive squares in only one way, i.e., 1849088675344 + 52512930649 = 1359812^2 + 229157^2 .

It is a cyclic number.

It is not a de Polignac number, because 1901601605993 - 2⁶ = 1901601605929 is a prime.

It is not a weakly prime, because it can be changed into another prime (1901601605999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 950800802996 + 950800802997.

It is an arithmetic number, because the mean of its divisors is an integer number (950800802997).

Almost surely, 2^{1901601605993} is an apocalyptic number.

It is an amenable number.

1901601605993 is a deficient number, since it is larger than the sum of its proper divisors (1).

1901601605993 is an equidigital number, since it uses as much as digits as its factorization.

1901601605993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 393660, while the sum is 50.

The spelling of 1901601605993 in words is "one trillion, nine hundred one billion, six hundred one million, six hundred five thousand, nine hundred ninety-three".