309418477108 has 24 divisors (see below), whose sum is σ = 584974395432. Its totient is φ = 142358020224.

The previous prime is 309418477103. The next prime is 309418477117. The reversal of 309418477108 is 801774814903.

It can be written as a sum of positive squares in 4 ways, for example, as 20288583844 + 289129893264 = 142438^2 + 537708^2 .

It is a super-3 number, since 3×309418477108³ (a number of 35 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (309418477103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9368935 + ... + 9401902.

It is an arithmetic number, because the mean of its divisors is an integer number (24373933143).

Almost surely, 2^309418477108 is an apocalyptic number.

It is an amenable number.

309418477108 is a deficient number, since it is larger than the sum of its proper divisors (275555918324).

309418477108 is a wasteful number, since it uses less digits than its factorization.

309418477108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18771171 (or 18771169 counting only the distinct ones).

The product of its (nonzero) digits is 1354752, while the sum is 52.

The spelling of 309418477108 in words is "three hundred nine billion, four hundred eighteen million, four hundred seventy-seven thousand, one hundred eight".