72620300171 has 4 divisors (see below), whose sum is σ = 76892082552. Its totient is φ = 68348517792.

The previous prime is 72620300167. The next prime is 72620300177. The reversal of 72620300171 is 17100302627.

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

It is a cyclic number.

It is not a de Polignac number, because 72620300171 - 2² = 72620300167 is a prime.

It is a super-2 number, since 2×72620300171² (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 (72620300177) 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, 2135891165 + ... + 2135891198.

It is an arithmetic number, because the mean of its divisors is an integer number (19223020638).

Almost surely, 2^72620300171 is an apocalyptic number.

72620300171 is a deficient number, since it is larger than the sum of its proper divisors (4271782381).

72620300171 is a wasteful number, since it uses less digits than its factorization.

72620300171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4271782380.

The product of its (nonzero) digits is 3528, while the sum is 29.

Adding to 72620300171 its reverse (17100302627), we get a palindrome (89720602798).

The spelling of 72620300171 in words is "seventy-two billion, six hundred twenty million, three hundred thousand, one hundred seventy-one".