6978140955 has 16 divisors (see below), whose sum is σ = 12405584160. Its totient is φ = 3721675104.

The previous prime is 6978140947. The next prime is 6978140957. The reversal of 6978140955 is 5590418796.

It is not a de Polignac number, because 6978140955 - 2³ = 6978140947 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6978140957) 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, 25844832 + ... + 25845101.

It is an arithmetic number, because the mean of its divisors is an integer number (775349010).

Almost surely, 2^6978140955 is an apocalyptic number.

6978140955 is a deficient number, since it is larger than the sum of its proper divisors (5427443205).

6978140955 is a wasteful number, since it uses less digits than its factorization.

6978140955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51689947 (or 51689941 counting only the distinct ones).

The product of its (nonzero) digits is 2721600, while the sum is 54.

The square root of 6978140955 is about 83535.2677316593. The cubic root of 6978140955 is about 1910.9379232563.

The spelling of 6978140955 in words is "six billion, nine hundred seventy-eight million, one hundred forty thousand, nine hundred fifty-five".