24778923479 has 2 divisors, whose sum is σ = 24778923480. Its totient is φ = 24778923478.

The previous prime is 24778923469. The next prime is 24778923497. The reversal of 24778923479 is 97432987742.

Together with next prime (24778923497) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-24778923479 is a prime.

It is a super-2 number, since 2×24778923479² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (24778923469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12389461739 + 12389461740.

It is an arithmetic number, because the mean of its divisors is an integer number (12389461740).

Almost surely, 2^24778923479 is an apocalyptic number.

24778923479 is a deficient number, since it is larger than the sum of its proper divisors (1).

24778923479 is an equidigital number, since it uses as much as digits as its factorization.

24778923479 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42674688, while the sum is 62.

The spelling of 24778923479 in words is "twenty-four billion, seven hundred seventy-eight million, nine hundred twenty-three thousand, four hundred seventy-nine".