16652207381 has 2 divisors, whose sum is σ = 16652207382. Its totient is φ = 16652207380.

The previous prime is 16652207311. The next prime is 16652207413. The reversal of 16652207381 is 18370225661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14504348356 + 2147859025 = 120434^2 + 46345^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16652207381 is a prime.

It is a super-2 number, since 2×16652207381² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16652207311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8326103690 + 8326103691.

It is an arithmetic number, because the mean of its divisors is an integer number (8326103691).

Almost surely, 2^16652207381 is an apocalyptic number.

It is an amenable number.

16652207381 is a deficient number, since it is larger than the sum of its proper divisors (1).

16652207381 is an equidigital number, since it uses as much as digits as its factorization.

16652207381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120960, while the sum is 41.

The spelling of 16652207381 in words is "sixteen billion, six hundred fifty-two million, two hundred seven thousand, three hundred eighty-one".