77550005 has 16 divisors (see below), whose sum is σ = 106115184. Its totient is φ = 53898240.

The previous prime is 77549987. The next prime is 77550019. The reversal of 77550005 is 50005577.

It can be written as a sum of positive squares in 8 ways, for example, as 1825201 + 75724804 = 1351^2 + 8702^2 .

It is a de Polignac number, because none of the positive numbers 2^k-77550005 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 77550005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33986 + ... + 36195.

It is an arithmetic number, because the mean of its divisors is an integer number (6632199).

Almost surely, 2^77550005 is an apocalyptic number.

It is an amenable number.

77550005 is a deficient number, since it is larger than the sum of its proper divisors (28565179).

77550005 is a wasteful number, since it uses less digits than its factorization.

77550005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70216.

The product of its (nonzero) digits is 6125, while the sum is 29.

The square root of 77550005 is about 8806.2480660040. The cubic root of 77550005 is about 426.4426269943.

The spelling of 77550005 in words is "seventy-seven million, five hundred fifty thousand, five".