187366425061021 has 2 divisors, whose sum is σ = 187366425061022. Its totient is φ = 187366425061020.

The previous prime is 187366425060953. The next prime is 187366425061063. The reversal of 187366425061021 is 120160524663781.

187366425061021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 185401283693796 + 1965141367225 = 13616214^2 + 1401835^2 .

It is a cyclic number.

It is not a de Polignac number, because 187366425061021 - 2¹¹ = 187366425058973 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 187366425061021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (187366425067021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 93683212530510 + 93683212530511.

It is an arithmetic number, because the mean of its divisors is an integer number (93683212530511).

Almost surely, 2^{187366425061021} is an apocalyptic number.

It is an amenable number.

187366425061021 is a deficient number, since it is larger than the sum of its proper divisors (1).

187366425061021 is an equidigital number, since it uses as much as digits as its factorization.

187366425061021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2903040, while the sum is 52.

The spelling of 187366425061021 in words is "one hundred eighty-seven trillion, three hundred sixty-six billion, four hundred twenty-five million, sixty-one thousand, twenty-one".