2180728365951 has 8 divisors (see below), whose sum is σ = 3001432589824. Its totient is φ = 1406921526360.

The previous prime is 2180728365947. The next prime is 2180728365953. The reversal of 2180728365951 is 1595638270812.

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

It is not a de Polignac number, because 2180728365951 - 2² = 2180728365947 is a prime.

It is a super-2 number, since 2×2180728365951² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2180728365891 and 2180728365900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2180728365953) 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, 11724345961 + ... + 11724346146.

It is an arithmetic number, because the mean of its divisors is an integer number (375179073728).

Almost surely, 2^{2180728365951} is an apocalyptic number.

2180728365951 is a deficient number, since it is larger than the sum of its proper divisors (820704223873).

2180728365951 is a wasteful number, since it uses less digits than its factorization.

2180728365951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23448692141.

The product of its (nonzero) digits is 7257600, while the sum is 57.

The spelling of 2180728365951 in words is "two trillion, one hundred eighty billion, seven hundred twenty-eight million, three hundred sixty-five thousand, nine hundred fifty-one".