187755447457 has 2 divisors, whose sum is σ = 187755447458. Its totient is φ = 187755447456.

The previous prime is 187755447427. The next prime is 187755447491. The reversal of 187755447457 is 754744557781.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 186141336481 + 1614110976 = 431441^2 + 40176^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-187755447457 is a prime.

It is not a weakly prime, because it can be changed into another prime (187755447427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 93877723728 + 93877723729.

It is an arithmetic number, because the mean of its divisors is an integer number (93877723729).

Almost surely, 2^187755447457 is an apocalyptic number.

It is an amenable number.

187755447457 is a deficient number, since it is larger than the sum of its proper divisors (1).

187755447457 is an equidigital number, since it uses as much as digits as its factorization.

187755447457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 153664000, while the sum is 64.

The spelling of 187755447457 in words is "one hundred eighty-seven billion, seven hundred fifty-five million, four hundred forty-seven thousand, four hundred fifty-seven".