537653551861 has 2 divisors, whose sum is σ = 537653551862. Its totient is φ = 537653551860.

The previous prime is 537653551817. The next prime is 537653551873. The reversal of 537653551861 is 168155356735.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 534616880625 + 3036671236 = 731175^2 + 55106^2 .

It is a cyclic number.

It is not a de Polignac number, because 537653551861 - 2¹¹ = 537653549813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (537653551261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 268826775930 + 268826775931.

It is an arithmetic number, because the mean of its divisors is an integer number (268826775931).

Almost surely, 2^537653551861 is an apocalyptic number.

It is an amenable number.

537653551861 is a deficient number, since it is larger than the sum of its proper divisors (1).

537653551861 is an equidigital number, since it uses as much as digits as its factorization.

537653551861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11340000, while the sum is 55.

The spelling of 537653551861 in words is "five hundred thirty-seven billion, six hundred fifty-three million, five hundred fifty-one thousand, eight hundred sixty-one".