281937366461 has 2 divisors, whose sum is σ = 281937366462. Its totient is φ = 281937366460.

The previous prime is 281937366341. The next prime is 281937366479. The reversal of 281937366461 is 164663739182.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 184024698361 + 97912668100 = 428981^2 + 312910^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-281937366461 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 281937366397 and 281937366406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (281937366481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140968683230 + 140968683231.

It is an arithmetic number, because the mean of its divisors is an integer number (140968683231).

Almost surely, 2^281937366461 is an apocalyptic number.

It is an amenable number.

281937366461 is a deficient number, since it is larger than the sum of its proper divisors (1).

281937366461 is an equidigital number, since it uses as much as digits as its factorization.

281937366461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7838208, while the sum is 56.

The spelling of 281937366461 in words is "two hundred eighty-one billion, nine hundred thirty-seven million, three hundred sixty-six thousand, four hundred sixty-one".