6978522457 has 8 divisors (see below), whose sum is σ = 7390607616. Its totient is φ = 6566613312.

The previous prime is 6978522451. The next prime is 6978522511. The reversal of 6978522457 is 7542258796.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6978522457 - 2¹⁹ = 6977998169 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6978522398 and 6978522407.

It is not an unprimeable number, because it can be changed into a prime (6978522451) 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, 42508 + ... + 125554.

It is an arithmetic number, because the mean of its divisors is an integer number (923825952).

Almost surely, 2^6978522457 is an apocalyptic number.

It is an amenable number.

6978522457 is a deficient number, since it is larger than the sum of its proper divisors (412085159).

6978522457 is a wasteful number, since it uses less digits than its factorization.

6978522457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88007.

The product of its digits is 8467200, while the sum is 55.

The square root of 6978522457 is about 83537.5511790955. The cubic root of 6978522457 is about 1910.9727469225.

The spelling of 6978522457 in words is "six billion, nine hundred seventy-eight million, five hundred twenty-two thousand, four hundred fifty-seven".