121472247618 has 90 divisors (see below), whose sum is σ = 275558827401. Its totient is φ = 39995390736.

The previous prime is 121472247563. The next prime is 121472247641. The reversal of 121472247618 is 816742274121.

121472247618 is a `hidden beast` number, since 1 + 2 + 1 + 4 + 7 + 2 + 24 + 7 + 618 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 77825934729 + 43646312889 = 278973^2 + 208917^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=246447.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 616610296 + ... + 616610492.

Almost surely, 2^121472247618 is an apocalyptic number.

121472247618 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 121472247618

121472247618 is an abundant number, since it is smaller than the sum of its proper divisors (154086579783).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121472247618 is an frugal number, since it uses more digits than its factorization.

121472247618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 686 (or 341 counting only the distinct ones).

The product of its digits is 301056, while the sum is 45.

The spelling of 121472247618 in words is "one hundred twenty-one billion, four hundred seventy-two million, two hundred forty-seven thousand, six hundred eighteen".