186923163157 has 4 divisors (see below), whose sum is σ = 186937145836. Its totient is φ = 186909180480.

The previous prime is 186923163137. The next prime is 186923163197. The reversal of 186923163157 is 751361329681.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 751361329681 = 9787 ⋅76771363.

It can be written as a sum of positive squares in 2 ways, for example, as 84875499556 + 102047663601 = 291334^2 + 319449^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-186923163157 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 (186923163137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6971268 + ... + 6998029.

It is an arithmetic number, because the mean of its divisors is an integer number (46734286459).

Almost surely, 2^186923163157 is an apocalyptic number.

It is an amenable number.

186923163157 is a deficient number, since it is larger than the sum of its proper divisors (13982679).

186923163157 is a wasteful number, since it uses less digits than its factorization.

186923163157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13982678.

The product of its digits is 1632960, while the sum is 52.

The spelling of 186923163157 in words is "one hundred eighty-six billion, nine hundred twenty-three million, one hundred sixty-three thousand, one hundred fifty-seven".