6978648451 has 2 divisors, whose sum is σ = 6978648452. Its totient is φ = 6978648450.

The previous prime is 6978648437. The next prime is 6978648527. The reversal of 6978648451 is 1548468796.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6978648451 - 2⁵ = 6978648419 is a prime.

It is not a weakly prime, because it can be changed into another prime (6978648401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3489324225 + 3489324226.

It is an arithmetic number, because the mean of its divisors is an integer number (3489324226).

Almost surely, 2^6978648451 is an apocalyptic number.

6978648451 is a deficient number, since it is larger than the sum of its proper divisors (1).

6978648451 is an equidigital number, since it uses as much as digits as its factorization.

6978648451 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11612160, while the sum is 58.

The square root of 6978648451 is about 83538.3052916445. The cubic root of 6978648451 is about 1910.9842474301.

The spelling of 6978648451 in words is "six billion, nine hundred seventy-eight million, six hundred forty-eight thousand, four hundred fifty-one".