16145150561 has 2 divisors, whose sum is σ = 16145150562. Its totient is φ = 16145150560.

The previous prime is 16145150557. The next prime is 16145150629. The reversal of 16145150561 is 16505154161.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13788630625 + 2356519936 = 117425^2 + 48544^2 .

It is a cyclic number.

It is not a de Polignac number, because 16145150561 - 2² = 16145150557 is a prime.

It is a super-2 number, since 2×16145150561² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (16145150501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8072575280 + 8072575281.

It is an arithmetic number, because the mean of its divisors is an integer number (8072575281).

Almost surely, 2^16145150561 is an apocalyptic number.

It is an amenable number.

16145150561 is a deficient number, since it is larger than the sum of its proper divisors (1).

16145150561 is an equidigital number, since it uses as much as digits as its factorization.

16145150561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18000, while the sum is 35.

The spelling of 16145150561 in words is "sixteen billion, one hundred forty-five million, one hundred fifty thousand, five hundred sixty-one".