39143981233663 has 2 divisors, whose sum is σ = 39143981233664. Its totient is φ = 39143981233662.

The previous prime is 39143981233661. The next prime is 39143981233699. The reversal of 39143981233663 is 36633218934193.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 39143981233663 - 2¹ = 39143981233661 is a prime.

It is a super-2 number, since 2×39143981233663² (a number of 28 digits) contains 22 as substring.

Together with 39143981233661, 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 (39143981233661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19571990616831 + 19571990616832.

It is an arithmetic number, because the mean of its divisors is an integer number (19571990616832).

Almost surely, 2^{39143981233663} is an apocalyptic number.

39143981233663 is a deficient number, since it is larger than the sum of its proper divisors (1).

39143981233663 is an equidigital number, since it uses as much as digits as its factorization.

39143981233663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 45349632, while the sum is 61.

The spelling of 39143981233663 in words is "thirty-nine trillion, one hundred forty-three billion, nine hundred eighty-one million, two hundred thirty-three thousand, six hundred sixty-three".