28161706358764 has 96 divisors (see below), whose sum is σ = 56021438491200. Its totient is φ = 12269671464960.

The previous prime is 28161706358741. The next prime is 28161706358783. The reversal of 28161706358764 is 46785360716182.

It is a super-2 number, since 2×28161706358764² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28161706358696 and 28161706358705.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 226112572 + ... + 226237084.

It is an arithmetic number, because the mean of its divisors is an integer number (583556650950).

Almost surely, 2^{28161706358764} is an apocalyptic number.

It is an amenable number.

28161706358764 is a deficient number, since it is larger than the sum of its proper divisors (27859732132436).

28161706358764 is a wasteful number, since it uses less digits than its factorization.

28161706358764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125843 (or 125841 counting only the distinct ones).

The product of its (nonzero) digits is 81285120, while the sum is 64.

The spelling of 28161706358764 in words is "twenty-eight trillion, one hundred sixty-one billion, seven hundred six million, three hundred fifty-eight thousand, seven hundred sixty-four".