2157180163994 has 8 divisors (see below), whose sum is σ = 3311020716960. Its totient is φ = 1053506591676.

The previous prime is 2157180163979. The next prime is 2157180164017. The reversal of 2157180163994 is 4993610817512.

It is a happy number.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12541745054 + ... + 12541745225.

It is an arithmetic number, because the mean of its divisors is an integer number (413877589620).

It is a 1-persistent number, because it is pandigital, but 2⋅2157180163994 = 4314360327988 is not.

Almost surely, 2^{2157180163994} is an apocalyptic number.

2157180163994 is a deficient number, since it is larger than the sum of its proper divisors (1153840552966).

2157180163994 is a wasteful number, since it uses less digits than its factorization.

2157180163994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25083490324.

The product of its (nonzero) digits is 3265920, while the sum is 56.

The spelling of 2157180163994 in words is "two trillion, one hundred fifty-seven billion, one hundred eighty million, one hundred sixty-three thousand, nine hundred ninety-four".