12157448702481 has 6 divisors (see below), whose sum is σ = 17560759236930. Its totient is φ = 8104965801648.

The previous prime is 12157448702473. The next prime is 12157448702489. The reversal of 12157448702481 is 18420784475121.

It is a happy number.

12157448702481 is a `hidden beast` number, since 1 + 2 + 1 + 57 + 4 + 48 + 70 + 2 + 481 = 666.

It is an interprime number because it is at equal distance from previous prime (12157448702473) and next prime (12157448702489).

It can be written as a sum of positive squares in only one way, i.e., 10357075134081 + 1800373568400 = 3218241^2 + 1341780^2 .

It is not a de Polignac number, because 12157448702481 - 2³ = 12157448702473 is a prime.

It is a super-2 number, since 2×12157448702481² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12157448702489) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 675413816796 + ... + 675413816813.

It is an arithmetic number, because the mean of its divisors is an integer number (2926793206155).

Almost surely, 2^{12157448702481} is an apocalyptic number.

It is an amenable number.

12157448702481 is a deficient number, since it is larger than the sum of its proper divisors (5403310534449).

12157448702481 is a wasteful number, since it uses less digits than its factorization.

12157448702481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1350827633615 (or 1350827633612 counting only the distinct ones).

The product of its (nonzero) digits is 4014080, while the sum is 54.

The spelling of 12157448702481 in words is "twelve trillion, one hundred fifty-seven billion, four hundred forty-eight million, seven hundred two thousand, four hundred eighty-one".