16551016061 has 2 divisors, whose sum is σ = 16551016062. Its totient is φ = 16551016060.

The previous prime is 16551016021. The next prime is 16551016067. The reversal of 16551016061 is 16061015561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12256704100 + 4294311961 = 110710^2 + 65531^2 .

It is a cyclic number.

It is not a de Polignac number, because 16551016061 - 2¹⁴ = 16550999677 is a prime.

It is a super-2 number, since 2×16551016061² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16551016067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8275508030 + 8275508031.

It is an arithmetic number, because the mean of its divisors is an integer number (8275508031).

Almost surely, 2^16551016061 is an apocalyptic number.

It is an amenable number.

16551016061 is a deficient number, since it is larger than the sum of its proper divisors (1).

16551016061 is an equidigital number, since it uses as much as digits as its factorization.

16551016061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5400, while the sum is 32.

The spelling of 16551016061 in words is "sixteen billion, five hundred fifty-one million, sixteen thousand, sixty-one".