2870193901781 has 2 divisors, whose sum is σ = 2870193901782. Its totient is φ = 2870193901780.

The previous prime is 2870193901709. The next prime is 2870193901823. The reversal of 2870193901781 is 1871093910782.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2586818672881 + 283375228900 = 1608359^2 + 532330^2 .

It is a cyclic number.

It is not a de Polignac number, because 2870193901781 - 2¹⁰ = 2870193900757 is a prime.

It is a super-2 number, since 2×2870193901781² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2870193901381) 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, 1435096950890 + 1435096950891.

It is an arithmetic number, because the mean of its divisors is an integer number (1435096950891).

Almost surely, 2^{2870193901781} is an apocalyptic number.

It is an amenable number.

2870193901781 is a deficient number, since it is larger than the sum of its proper divisors (1).

2870193901781 is an equidigital number, since it uses as much as digits as its factorization.

2870193901781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1524096, while the sum is 56.

Subtracting from 2870193901781 its reverse (1871093910782), we obtain a palindrome (999099990999).

The spelling of 2870193901781 in words is "two trillion, eight hundred seventy billion, one hundred ninety-three million, nine hundred one thousand, seven hundred eighty-one".