1611701653 has 2 divisors, whose sum is σ = 1611701654. Its totient is φ = 1611701652.

The previous prime is 1611701647. The next prime is 1611701681. The reversal of 1611701653 is 3561071161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1611380164 + 321489 = 40142^2 + 567^2 .

It is a cyclic number.

It is not a de Polignac number, because 1611701653 - 2¹⁷ = 1611570581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1611701603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 805850826 + 805850827.

It is an arithmetic number, because the mean of its divisors is an integer number (805850827).

Almost surely, 2^1611701653 is an apocalyptic number.

It is an amenable number.

1611701653 is a deficient number, since it is larger than the sum of its proper divisors (1).

1611701653 is an equidigital number, since it uses as much as digits as its factorization.

1611701653 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3780, while the sum is 31.

The square root of 1611701653 is about 40146.0041971801. The cubic root of 1611701653 is about 1172.4514923945.

The spelling of 1611701653 in words is "one billion, six hundred eleven million, seven hundred one thousand, six hundred fifty-three".