2178213365007 has 6 divisors (see below), whose sum is σ = 3146308193912. Its totient is φ = 1452142243332.

The previous prime is 2178213364991. The next prime is 2178213365021. The reversal of 2178213365007 is 7005633128712.

2178213365007 is a `hidden beast` number, since 2 + 1 + 7 + 8 + 2 + 133 + 6 + 500 + 7 = 666.

It is not a de Polignac number, because 2178213365007 - 2⁴ = 2178213364991 is a prime.

It is a super-2 number, since 2×2178213365007² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2178213365057) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 121011853603 + ... + 121011853620.

Almost surely, 2^{2178213365007} is an apocalyptic number.

2178213365007 is a deficient number, since it is larger than the sum of its proper divisors (968094828905).

2178213365007 is a wasteful number, since it uses less digits than its factorization.

2178213365007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242023707229 (or 242023707226 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 45.

The spelling of 2178213365007 in words is "two trillion, one hundred seventy-eight billion, two hundred thirteen million, three hundred sixty-five thousand, seven".