187280916461 has 2 divisors, whose sum is σ = 187280916462. Its totient is φ = 187280916460.

The previous prime is 187280916457. The next prime is 187280916481. The reversal of 187280916461 is 164619082781.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 187099502500 + 181413961 = 432550^2 + 13469^2 .

It is a cyclic number.

It is not a de Polignac number, because 187280916461 - 2² = 187280916457 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (187280916481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 93640458230 + 93640458231.

It is an arithmetic number, because the mean of its divisors is an integer number (93640458231).

Almost surely, 2^187280916461 is an apocalyptic number.

It is an amenable number.

187280916461 is a deficient number, since it is larger than the sum of its proper divisors (1).

187280916461 is an equidigital number, since it uses as much as digits as its factorization.

187280916461 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1161216, while the sum is 53.

The spelling of 187280916461 in words is "one hundred eighty-seven billion, two hundred eighty million, nine hundred sixteen thousand, four hundred sixty-one".