187118920663 has 4 divisors (see below), whose sum is σ = 188310761080. Its totient is φ = 185927080248.

The previous prime is 187118920609. The next prime is 187118920697. The reversal of 187118920663 is 366029811781.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 366029811781 = 182957 ⋅2000633.

It is a cyclic number.

It is not a de Polignac number, because 187118920663 - 2¹³ = 187118912471 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 187118920663.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (187118920063) 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, 595919973 + ... + 595920286.

It is an arithmetic number, because the mean of its divisors is an integer number (47077690270).

Almost surely, 2^187118920663 is an apocalyptic number.

187118920663 is a deficient number, since it is larger than the sum of its proper divisors (1191840417).

187118920663 is a wasteful number, since it uses less digits than its factorization.

187118920663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1191840416.

The product of its (nonzero) digits is 870912, while the sum is 52.

The spelling of 187118920663 in words is "one hundred eighty-seven billion, one hundred eighteen million, nine hundred twenty thousand, six hundred sixty-three".