72107381286721 has 8 divisors (see below), whose sum is σ = 78662788265088. Its totient is φ = 65552006058000.

The previous prime is 72107381286683. The next prime is 72107381286751. The reversal of 72107381286721 is 12768218370127.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 72107381286721 - 2¹³ = 72107381278529 is a prime.

It is a super-2 number, since 2×72107381286721² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72107381286751) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3058290 + ... + 12392251.

It is an arithmetic number, because the mean of its divisors is an integer number (9832848533136).

Almost surely, 2^{72107381286721} is an apocalyptic number.

It is an amenable number.

72107381286721 is a deficient number, since it is larger than the sum of its proper divisors (6555406978367).

72107381286721 is a wasteful number, since it uses less digits than its factorization.

72107381286721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15874823.

The product of its (nonzero) digits is 3161088, while the sum is 55.

The spelling of 72107381286721 in words is "seventy-two trillion, one hundred seven billion, three hundred eighty-one million, two hundred eighty-six thousand, seven hundred twenty-one".