16574102981 has 2 divisors, whose sum is σ = 16574102982. Its totient is φ = 16574102980.

The previous prime is 16574102969. The next prime is 16574103031. The reversal of 16574102981 is 18920147561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9689252356 + 6884850625 = 98434^2 + 82975^2 .

It is a cyclic number.

It is not a de Polignac number, because 16574102981 - 2⁶ = 16574102917 is a prime.

It is a super-2 number, since 2×16574102981² (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 (16574102081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8287051490 + 8287051491.

It is an arithmetic number, because the mean of its divisors is an integer number (8287051491).

Almost surely, 2^16574102981 is an apocalyptic number.

It is an amenable number.

16574102981 is a deficient number, since it is larger than the sum of its proper divisors (1).

16574102981 is an equidigital number, since it uses as much as digits as its factorization.

16574102981 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 44.

The spelling of 16574102981 in words is "sixteen billion, five hundred seventy-four million, one hundred two thousand, nine hundred eighty-one".