74261313149 has 4 divisors (see below), whose sum is σ = 74262185820. Its totient is φ = 74260440480.

The previous prime is 74261313131. The next prime is 74261313151. The reversal of 74261313149 is 94131316247.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94131316247 = 42443 ⋅2217829.

It can be written as a sum of positive squares in 2 ways, for example, as 37439541049 + 36821772100 = 193493^2 + 191890^2 .

It is a cyclic number.

It is not a de Polignac number, because 74261313149 - 2²⁴ = 74244535933 is a prime.

It is a super-2 number, since 2×74261313149² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74261313349) 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 in 3 ways as a sum of consecutive naturals, for example, 292994 + ... + 484115.

It is an arithmetic number, because the mean of its divisors is an integer number (18565546455).

Almost surely, 2^74261313149 is an apocalyptic number.

It is an amenable number.

74261313149 is a deficient number, since it is larger than the sum of its proper divisors (872671).

74261313149 is an equidigital number, since it uses as much as digits as its factorization.

74261313149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 872670.

The product of its digits is 108864, while the sum is 41.

The spelling of 74261313149 in words is "seventy-four billion, two hundred sixty-one million, three hundred thirteen thousand, one hundred forty-nine".