16951540145 has 4 divisors (see below), whose sum is σ = 20341848180. Its totient is φ = 13561232112.

The previous prime is 16951540141. The next prime is 16951540171. The reversal of 16951540145 is 54104515961.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54104515961 = 197 ⋅274642213.

It can be written as a sum of positive squares in 2 ways, for example, as 8329117696 + 8622422449 = 91264^2 + 92857^2 .

It is a cyclic number.

It is not a de Polignac number, because 16951540145 - 2² = 16951540141 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16951540141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1695154010 + ... + 1695154019.

It is an arithmetic number, because the mean of its divisors is an integer number (5085462045).

Almost surely, 2^16951540145 is an apocalyptic number.

It is an amenable number.

16951540145 is a deficient number, since it is larger than the sum of its proper divisors (3390308035).

16951540145 is an equidigital number, since it uses as much as digits as its factorization.

16951540145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3390308034.

The product of its (nonzero) digits is 108000, while the sum is 41.

The spelling of 16951540145 in words is "sixteen billion, nine hundred fifty-one million, five hundred forty thousand, one hundred forty-five".