2178041071964 has 24 divisors (see below), whose sum is σ = 3869159394240. Its totient is φ = 1072608459264.

The previous prime is 2178041071963. The next prime is 2178041071981. The reversal of 2178041071964 is 4691701408712.

It is a super-2 number, since 2×2178041071964² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2178041071963) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4977149 + ... + 5397044.

It is an arithmetic number, because the mean of its divisors is an integer number (161214974760).

Almost surely, 2^{2178041071964} is an apocalyptic number.

It is an amenable number.

2178041071964 is a deficient number, since it is larger than the sum of its proper divisors (1691118322276).

2178041071964 is a wasteful number, since it uses less digits than its factorization.

2178041071964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10374989 (or 10374987 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 50.

The spelling of 2178041071964 in words is "two trillion, one hundred seventy-eight billion, forty-one million, seventy-one thousand, nine hundred sixty-four".