2178642460069 has 16 divisors (see below), whose sum is σ = 2230176960000. Its totient is φ = 2127606900336.

The previous prime is 2178642460067. The next prime is 2178642460091. The reversal of 2178642460069 is 9600642468712.

It is not a de Polignac number, because 2178642460069 - 2¹ = 2178642460067 is a prime.

It is a super-2 number, since 2×2178642460069² (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 (2178642460063) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21520432 + ... + 21621430.

It is an arithmetic number, because the mean of its divisors is an integer number (139386060000).

Almost surely, 2^{2178642460069} is an apocalyptic number.

It is an amenable number.

2178642460069 is a deficient number, since it is larger than the sum of its proper divisors (51534499931).

2178642460069 is a wasteful number, since it uses less digits than its factorization.

2178642460069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103464.

The product of its (nonzero) digits is 6967296, while the sum is 55.

The spelling of 2178642460069 in words is "two trillion, one hundred seventy-eight billion, six hundred forty-two million, four hundred sixty thousand, sixty-nine".