74733878509 has 2 divisors, whose sum is σ = 74733878510. Its totient is φ = 74733878508.

The previous prime is 74733878473. The next prime is 74733878519. The reversal of 74733878509 is 90587833747.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58852334025 + 15881544484 = 242595^2 + 126022^2 .

It is a cyclic number.

It is not a de Polignac number, because 74733878509 - 2¹³ = 74733870317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74733878519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37366939254 + 37366939255.

It is an arithmetic number, because the mean of its divisors is an integer number (37366939255).

Almost surely, 2^74733878509 is an apocalyptic number.

It is an amenable number.

74733878509 is a deficient number, since it is larger than the sum of its proper divisors (1).

74733878509 is an equidigital number, since it uses as much as digits as its factorization.

74733878509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 35562240, while the sum is 61.

The spelling of 74733878509 in words is "seventy-four billion, seven hundred thirty-three million, eight hundred seventy-eight thousand, five hundred nine".