77225617 has 6 divisors (see below), whose sum is σ = 89833938. Its totient is φ = 66193344.

The previous prime is 77225609. The next prime is 77225639. The reversal of 77225617 is 71652277.

It can be written as a sum of positive squares in only one way, i.e., 44036496 + 33189121 = 6636^2 + 5761^2 .

It is not a de Polignac number, because 77225617 - 2³ = 77225609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77222617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 787968 + ... + 788065.

It is an arithmetic number, because the mean of its divisors is an integer number (14972323).

Almost surely, 2^77225617 is an apocalyptic number.

It is an amenable number.

77225617 is a deficient number, since it is larger than the sum of its proper divisors (12608321).

77225617 is a wasteful number, since it uses less digits than its factorization.

77225617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1576047 (or 1576040 counting only the distinct ones).

The product of its digits is 41160, while the sum is 37.

The square root of 77225617 is about 8787.8107057446. The cubic root of 77225617 is about 425.8471995652.

The spelling of 77225617 in words is "seventy-seven million, two hundred twenty-five thousand, six hundred seventeen".