537638727971 has 2 divisors, whose sum is σ = 537638727972. Its totient is φ = 537638727970.

The previous prime is 537638727919. The next prime is 537638727973. The reversal of 537638727971 is 179727836735.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-537638727971 is a prime.

It is a Sophie Germain prime.

Together with 537638727973, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 537638727898 and 537638727907.

It is not a weakly prime, because it can be changed into another prime (537638727973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 268819363985 + 268819363986.

It is an arithmetic number, because the mean of its divisors is an integer number (268819363986).

Almost surely, 2^537638727971 is an apocalyptic number.

537638727971 is a deficient number, since it is larger than the sum of its proper divisors (1).

537638727971 is an equidigital number, since it uses as much as digits as its factorization.

537638727971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 93350880, while the sum is 65.

The spelling of 537638727971 in words is "five hundred thirty-seven billion, six hundred thirty-eight million, seven hundred twenty-seven thousand, nine hundred seventy-one".