1871660315401 has 2 divisors, whose sum is σ = 1871660315402. Its totient is φ = 1871660315400.

The previous prime is 1871660315377. The next prime is 1871660315411. The reversal of 1871660315401 is 1045130661781.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1793660204176 + 78000111225 = 1339276^2 + 279285^2 .

It is a cyclic number.

It is not a de Polignac number, because 1871660315401 - 2⁹ = 1871660314889 is a prime.

It is a super-2 number, since 2×1871660315401² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1871660315411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 935830157700 + 935830157701.

It is an arithmetic number, because the mean of its divisors is an integer number (935830157701).

Almost surely, 2^{1871660315401} is an apocalyptic number.

It is an amenable number.

1871660315401 is a deficient number, since it is larger than the sum of its proper divisors (1).

1871660315401 is an equidigital number, since it uses as much as digits as its factorization.

1871660315401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120960, while the sum is 43.

The spelling of 1871660315401 in words is "one trillion, eight hundred seventy-one billion, six hundred sixty million, three hundred fifteen thousand, four hundred one".