1390416668161 has 2 divisors, whose sum is σ = 1390416668162. Its totient is φ = 1390416668160.

The previous prime is 1390416668117. The next prime is 1390416668171. The reversal of 1390416668161 is 1618666140931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 846503043136 + 543913625025 = 920056^2 + 737505^2 .

It is a cyclic number.

It is not a de Polignac number, because 1390416668161 - 2⁷ = 1390416668033 is a prime.

It is a super-2 number, since 2×1390416668161² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1390416668099 and 1390416668108.

It is not a weakly prime, because it can be changed into another prime (1390416668171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 695208334080 + 695208334081.

It is an arithmetic number, because the mean of its divisors is an integer number (695208334081).

Almost surely, 2^{1390416668161} is an apocalyptic number.

It is an amenable number.

1390416668161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1390416668161 is an equidigital number, since it uses as much as digits as its factorization.

1390416668161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1119744, while the sum is 52.

The spelling of 1390416668161 in words is "one trillion, three hundred ninety billion, four hundred sixteen million, six hundred sixty-eight thousand, one hundred sixty-one".