187940065051 has 4 divisors (see below), whose sum is σ = 187941058704. Its totient is φ = 187939071400.

The previous prime is 187940065007. The next prime is 187940065057. The reversal of 187940065051 is 150560049781.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-187940065051 is a prime.

It is a super-2 number, since 2×187940065051² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 187940064992 and 187940065010.

It is not an unprimeable number, because it can be changed into a prime (187940065057) 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, 115615 + ... + 623896.

It is an arithmetic number, because the mean of its divisors is an integer number (46985264676).

Almost surely, 2^187940065051 is an apocalyptic number.

187940065051 is a deficient number, since it is larger than the sum of its proper divisors (993653).

187940065051 is an equidigital number, since it uses as much as digits as its factorization.

187940065051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 993652.

The product of its (nonzero) digits is 302400, while the sum is 46.

The spelling of 187940065051 in words is "one hundred eighty-seven billion, nine hundred forty million, sixty-five thousand, fifty-one".