74777229909 has 6 divisors (see below), whose sum is σ = 108011554326. Its totient is φ = 49851486600.

The previous prime is 74777229899. The next prime is 74777229983. The reversal of 74777229909 is 90992277747.

74777229909 is a `hidden beast` number, since 7 + 477 + 72 + 2 + 9 + 90 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 68279257809 + 6497972100 = 261303^2 + 80610^2 .

It is not a de Polignac number, because 74777229909 - 2²⁵ = 74743675477 is a prime.

It is a super-2 number, since 2×74777229909² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74777228909) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4154290542 + ... + 4154290559.

It is an arithmetic number, because the mean of its divisors is an integer number (18001925721).

Almost surely, 2^74777229909 is an apocalyptic number.

It is an amenable number.

74777229909 is a deficient number, since it is larger than the sum of its proper divisors (33234324417).

74777229909 is a wasteful number, since it uses less digits than its factorization.

74777229909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8308581107 (or 8308581104 counting only the distinct ones).

The product of its (nonzero) digits is 28005264, while the sum is 63.

The spelling of 74777229909 in words is "seventy-four billion, seven hundred seventy-seven million, two hundred twenty-nine thousand, nine hundred nine".