12387400181 has 8 divisors (see below), whose sum is σ = 13363980000. Its totient is φ = 11414206512.

The previous prime is 12387400171. The next prime is 12387400273. The reversal of 12387400181 is 18100478321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12387400181 is a prime.

It is a super-2 number, since 2×12387400181² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12387400111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 838931 + ... + 853568.

It is an arithmetic number, because the mean of its divisors is an integer number (1670497500).

Almost surely, 2^12387400181 is an apocalyptic number.

It is an amenable number.

12387400181 is a deficient number, since it is larger than the sum of its proper divisors (976579819).

12387400181 is a wasteful number, since it uses less digits than its factorization.

12387400181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1693075.

The product of its (nonzero) digits is 10752, while the sum is 35.

The spelling of 12387400181 in words is "twelve billion, three hundred eighty-seven million, four hundred thousand, one hundred eighty-one".