74887678849 has 2 divisors, whose sum is σ = 74887678850. Its totient is φ = 74887678848.

The previous prime is 74887678813. The next prime is 74887678871. The reversal of 74887678849 is 94887678847.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65830730625 + 9056948224 = 256575^2 + 95168^2 .

It is a cyclic number.

It is not a de Polignac number, because 74887678849 - 2¹⁹ = 74887154561 is a prime.

It is not a weakly prime, because it can be changed into another prime (74887678249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37443839424 + 37443839425.

It is an arithmetic number, because the mean of its divisors is an integer number (37443839425).

Almost surely, 2^74887678849 is an apocalyptic number.

It is an amenable number.

74887678849 is a deficient number, since it is larger than the sum of its proper divisors (1).

74887678849 is an equidigital number, since it uses as much as digits as its factorization.

74887678849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1213857792, while the sum is 76.

The spelling of 74887678849 in words is "seventy-four billion, eight hundred eighty-seven million, six hundred seventy-eight thousand, eight hundred forty-nine".