151610721205 has 4 divisors (see below), whose sum is σ = 181932865452. Its totient is φ = 121288576960.

The previous prime is 151610721203. The next prime is 151610721221. The reversal of 151610721205 is 502127016151.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 70385151204 + 81225570001 = 265302^2 + 285001^2 .

It is not a de Polignac number, because 151610721205 - 2¹ = 151610721203 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (151610721203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15161072116 + ... + 15161072125.

It is an arithmetic number, because the mean of its divisors is an integer number (45483216363).

Almost surely, 2^151610721205 is an apocalyptic number.

It is an amenable number.

151610721205 is a deficient number, since it is larger than the sum of its proper divisors (30322144247).

151610721205 is an equidigital number, since it uses as much as digits as its factorization.

151610721205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30322144246.

The product of its (nonzero) digits is 4200, while the sum is 31.

Adding to 151610721205 its reverse (502127016151), we get a palindrome (653737737356).

The spelling of 151610721205 in words is "one hundred fifty-one billion, six hundred ten million, seven hundred twenty-one thousand, two hundred five".