168211439802037 has 2 divisors, whose sum is σ = 168211439802038. Its totient is φ = 168211439802036.

The previous prime is 168211439801957. The next prime is 168211439802079. The reversal of 168211439802037 is 730208934112861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 108832486862961 + 59378952939076 = 10432281^2 + 7705774^2 .

It is a cyclic number.

It is not a de Polignac number, because 168211439802037 - 2³⁵ = 168177080063669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168211439802337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84105719901018 + 84105719901019.

It is an arithmetic number, because the mean of its divisors is an integer number (84105719901019).

Almost surely, 2^{168211439802037} is an apocalyptic number.

It is an amenable number.

168211439802037 is a deficient number, since it is larger than the sum of its proper divisors (1).

168211439802037 is an equidigital number, since it uses as much as digits as its factorization.

168211439802037 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3483648, while the sum is 55.

The spelling of 168211439802037 in words is "one hundred sixty-eight trillion, two hundred eleven billion, four hundred thirty-nine million, eight hundred two thousand, thirty-seven".