12997986562157 has 4 divisors (see below), whose sum is σ = 13682091118080. Its totient is φ = 12313882006236.

The previous prime is 12997986562153. The next prime is 12997986562199. The reversal of 12997986562157 is 75126568979921.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12997986562157 - 2² = 12997986562153 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12997986562153) by changing a digit.

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, 342052277933 + ... + 342052277970.

It is an arithmetic number, because the mean of its divisors is an integer number (3420522779520).

Almost surely, 2^{12997986562157} is an apocalyptic number.

It is an amenable number.

12997986562157 is a deficient number, since it is larger than the sum of its proper divisors (684104555923).

12997986562157 is an equidigital number, since it uses as much as digits as its factorization.

12997986562157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 684104555922.

The product of its digits is 1028764800, while the sum is 77.

The spelling of 12997986562157 in words is "twelve trillion, nine hundred ninety-seven billion, nine hundred eighty-six million, five hundred sixty-two thousand, one hundred fifty-seven".