73130250161 has 4 divisors (see below), whose sum is σ = 73224856692. Its totient is φ = 73035643632.

The previous prime is 73130250121. The next prime is 73130250217. The reversal of 73130250161 is 16105203137.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16105203137 = 71 ⋅226833847.

It can be written as a sum of positive squares in 2 ways, for example, as 2464129600 + 70666120561 = 49640^2 + 265831^2 .

It is a cyclic number.

It is not a de Polignac number, because 73130250161 - 2¹⁴ = 73130233777 is a prime.

It is a super-2 number, since 2×73130250161² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73130250121) 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, 47302106 + ... + 47303651.

It is an arithmetic number, because the mean of its divisors is an integer number (18306214173).

Almost surely, 2^73130250161 is an apocalyptic number.

It is an amenable number.

73130250161 is a deficient number, since it is larger than the sum of its proper divisors (94606531).

73130250161 is an equidigital number, since it uses as much as digits as its factorization.

73130250161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94606530.

The product of its (nonzero) digits is 3780, while the sum is 29.

Adding to 73130250161 its reverse (16105203137), we get a palindrome (89235453298).

The spelling of 73130250161 in words is "seventy-three billion, one hundred thirty million, two hundred fifty thousand, one hundred sixty-one".