2155668700037 has 2 divisors, whose sum is σ = 2155668700038. Its totient is φ = 2155668700036.

The previous prime is 2155668699959. The next prime is 2155668700057. The reversal of 2155668700037 is 7300078665512.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2113973510401 + 41695189636 = 1453951^2 + 204194^2 .

It is a cyclic number.

It is not a de Polignac number, because 2155668700037 - 2⁸ = 2155668699781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2155668700057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1077834350018 + 1077834350019.

It is an arithmetic number, because the mean of its divisors is an integer number (1077834350019).

Almost surely, 2^{2155668700037} is an apocalyptic number.

It is an amenable number.

2155668700037 is a deficient number, since it is larger than the sum of its proper divisors (1).

2155668700037 is an equidigital number, since it uses as much as digits as its factorization.

2155668700037 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2116800, while the sum is 50.

The spelling of 2155668700037 in words is "two trillion, one hundred fifty-five billion, six hundred sixty-eight million, seven hundred thousand, thirty-seven".