74813807091 has 4 divisors (see below), whose sum is σ = 99751742792. Its totient is φ = 49875871392.

The previous prime is 74813807087. The next prime is 74813807147. The reversal of 74813807091 is 19070831847.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19070831847 = 3 ⋅6356943949.

It is not a de Polignac number, because 74813807091 - 2² = 74813807087 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 74813807091.

It is not an unprimeable number, because it can be changed into a prime (74813807051) 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 in 3 ways as a sum of consecutive naturals, for example, 12468967846 + ... + 12468967851.

It is an arithmetic number, because the mean of its divisors is an integer number (24937935698).

Almost surely, 2^74813807091 is an apocalyptic number.

74813807091 is a deficient number, since it is larger than the sum of its proper divisors (24937935701).

74813807091 is a wasteful number, since it uses less digits than its factorization.

74813807091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24937935700.

The product of its (nonzero) digits is 338688, while the sum is 48.

The spelling of 74813807091 in words is "seventy-four billion, eight hundred thirteen million, eight hundred seven thousand, ninety-one".