7478187221108 has 12 divisors (see below), whose sum is σ = 13206890276580. Its totient is φ = 3704789999232.

The previous prime is 7478187221083. The next prime is 7478187221123. The reversal of 7478187221108 is 8011227818747.

It can be written as a sum of positive squares in 2 ways, for example, as 4725415135204 + 2752772085904 = 2173802^2 + 1659148^2 .

It is a super-2 number, since 2×7478187221108² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8575902341 + ... + 8575903212.

It is an arithmetic number, because the mean of its divisors is an integer number (1100574189715).

Almost surely, 2^{7478187221108} is an apocalyptic number.

It is an amenable number.

7478187221108 is a deficient number, since it is larger than the sum of its proper divisors (5728703055472).

7478187221108 is a wasteful number, since it uses less digits than its factorization.

7478187221108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17151805666 (or 17151805664 counting only the distinct ones).

The product of its (nonzero) digits is 2809856, while the sum is 56.

The spelling of 7478187221108 in words is "seven trillion, four hundred seventy-eight billion, one hundred eighty-seven million, two hundred twenty-one thousand, one hundred eight".