72447760377321 has 16 divisors (see below), whose sum is σ = 116206933939200. Its totient is φ = 39219840204048.

The previous prime is 72447760377287. The next prime is 72447760377337. The reversal of 72447760377321 is 12377306774427.

It is not a de Polignac number, because 72447760377321 - 2⁷ = 72447760377193 is a prime.

It is a super-2 number, since 2×72447760377321² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (72447760377371) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 90786666741 + ... + 90786667538.

It is an arithmetic number, because the mean of its divisors is an integer number (7262933371200).

Almost surely, 2^{72447760377321} is an apocalyptic number.

It is an amenable number.

72447760377321 is a deficient number, since it is larger than the sum of its proper divisors (43759173561879).

72447760377321 is a wasteful number, since it uses less digits than its factorization.

72447760377321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181573334308.

The product of its (nonzero) digits is 58084992, while the sum is 60.

The spelling of 72447760377321 in words is "seventy-two trillion, four hundred forty-seven billion, seven hundred sixty million, three hundred seventy-seven thousand, three hundred twenty-one".