290012601661 has 2 divisors, whose sum is σ = 290012601662. Its totient is φ = 290012601660.

The previous prime is 290012601653. The next prime is 290012601677. The reversal of 290012601661 is 166106210092.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 151219099161 + 138793502500 = 388869^2 + 372550^2 .

It is a cyclic number.

It is not a de Polignac number, because 290012601661 - 2³ = 290012601653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (290012601691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 145006300830 + 145006300831.

It is an arithmetic number, because the mean of its divisors is an integer number (145006300831).

Almost surely, 2^290012601661 is an apocalyptic number.

It is an amenable number.

290012601661 is a deficient number, since it is larger than the sum of its proper divisors (1).

290012601661 is an equidigital number, since it uses as much as digits as its factorization.

290012601661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 34.

The spelling of 290012601661 in words is "two hundred ninety billion, twelve million, six hundred one thousand, six hundred sixty-one".