74742647479 has 2 divisors, whose sum is σ = 74742647480. Its totient is φ = 74742647478.

The previous prime is 74742647471. The next prime is 74742647519. The reversal of 74742647479 is 97474624747.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 74742647479 - 2³ = 74742647471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74742647471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37371323739 + 37371323740.

It is an arithmetic number, because the mean of its divisors is an integer number (37371323740).

Almost surely, 2^74742647479 is an apocalyptic number.

74742647479 is a deficient number, since it is larger than the sum of its proper divisors (1).

74742647479 is an equidigital number, since it uses as much as digits as its factorization.

74742647479 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 66382848, while the sum is 61.

The spelling of 74742647479 in words is "seventy-four billion, seven hundred forty-two million, six hundred forty-seven thousand, four hundred seventy-nine".