2145660006005 has 4 divisors (see below), whose sum is σ = 2574792007212. Its totient is φ = 1716528004800.

The previous prime is 2145660005953. The next prime is 2145660006029. The reversal of 2145660006005 is 5006000665412.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 460996187089 + 1684663818916 = 678967^2 + 1297946^2 .

It is not a de Polignac number, because 2145660006005 - 2²² = 2145655811701 is a prime.

It is a super-2 number, since 2×2145660006005² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 214566000596 + ... + 214566000605.

It is an arithmetic number, because the mean of its divisors is an integer number (643698001803).

Almost surely, 2^{2145660006005} is an apocalyptic number.

It is an amenable number.

2145660006005 is a deficient number, since it is larger than the sum of its proper divisors (429132001207).

2145660006005 is an equidigital number, since it uses as much as digits as its factorization.

2145660006005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429132001206.

The product of its (nonzero) digits is 43200, while the sum is 35.

The spelling of 2145660006005 in words is "two trillion, one hundred forty-five billion, six hundred sixty million, six thousand, five".