77941073005 has 4 divisors (see below), whose sum is σ = 93529287612. Its totient is φ = 62352858400.

The previous prime is 77941072997. The next prime is 77941073009. The reversal of 77941073005 is 50037014977.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 41090127849 + 36850945156 = 202707^2 + 191966^2 .

It is not a de Polignac number, because 77941073005 - 2³ = 77941072997 is a prime.

It is a super-2 number, since 2×77941073005² (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 (77941073009) 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, 7794107296 + ... + 7794107305.

It is an arithmetic number, because the mean of its divisors is an integer number (23382321903).

Almost surely, 2^77941073005 is an apocalyptic number.

It is an amenable number.

77941073005 is a deficient number, since it is larger than the sum of its proper divisors (15588214607).

77941073005 is a wasteful number, since it uses less digits than its factorization.

77941073005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15588214606.

The product of its (nonzero) digits is 185220, while the sum is 43.

The spelling of 77941073005 in words is "seventy-seven billion, nine hundred forty-one million, seventy-three thousand, five".