6023135521981 has 2 divisors, whose sum is σ = 6023135521982. Its totient is φ = 6023135521980.

The previous prime is 6023135521979. The next prime is 6023135522077. The reversal of 6023135521981 is 1891255313206.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5576049385956 + 447086136025 = 2361366^2 + 668645^2 .

It is a cyclic number.

It is not a de Polignac number, because 6023135521981 - 2¹ = 6023135521979 is a prime.

It is a super-2 number, since 2×6023135521981² (a number of 26 digits) contains 22 as substring.

Together with 6023135521979, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6023135521961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3011567760990 + 3011567760991.

It is an arithmetic number, because the mean of its divisors is an integer number (3011567760991).

Almost surely, 2^{6023135521981} is an apocalyptic number.

It is an amenable number.

6023135521981 is a deficient number, since it is larger than the sum of its proper divisors (1).

6023135521981 is an equidigital number, since it uses as much as digits as its factorization.

6023135521981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 388800, while the sum is 46.

The spelling of 6023135521981 in words is "six trillion, twenty-three billion, one hundred thirty-five million, five hundred twenty-one thousand, nine hundred eighty-one".