2107812573509 has 2 divisors, whose sum is σ = 2107812573510. Its totient is φ = 2107812573508.

The previous prime is 2107812573431. The next prime is 2107812573523. The reversal of 2107812573509 is 9053752187012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1914080551009 + 193732022500 = 1383503^2 + 440150^2 .

It is a cyclic number.

It is not a de Polignac number, because 2107812573509 - 2⁸ = 2107812573253 is a prime.

It is a super-3 number, since 3×2107812573509³ (a number of 38 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2107812573599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1053906286754 + 1053906286755.

It is an arithmetic number, because the mean of its divisors is an integer number (1053906286755).

Almost surely, 2^{2107812573509} is an apocalyptic number.

It is an amenable number.

2107812573509 is a deficient number, since it is larger than the sum of its proper divisors (1).

2107812573509 is an equidigital number, since it uses as much as digits as its factorization.

2107812573509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1058400, while the sum is 50.

The spelling of 2107812573509 in words is "two trillion, one hundred seven billion, eight hundred twelve million, five hundred seventy-three thousand, five hundred nine".