72311751273 has 4 divisors (see below), whose sum is σ = 96415668368. Its totient is φ = 48207834180.

The previous prime is 72311751257. The next prime is 72311751287. The reversal of 72311751273 is 37215711327.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 72311751273 - 2⁴ = 72311751257 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (72311751203) 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, 12051958543 + ... + 12051958548.

It is an arithmetic number, because the mean of its divisors is an integer number (24103917092).

Almost surely, 2^72311751273 is an apocalyptic number.

It is an amenable number.

72311751273 is a deficient number, since it is larger than the sum of its proper divisors (24103917095).

72311751273 is a wasteful number, since it uses less digits than its factorization.

72311751273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24103917094.

The product of its digits is 61740, while the sum is 39.

It can be divided in two parts, 723117 and 51273, that added together give a triangular number (774390 = T₁₂₄₄).

The spelling of 72311751273 in words is "seventy-two billion, three hundred eleven million, seven hundred fifty-one thousand, two hundred seventy-three".