18190127640538 has 64 divisors (see below), whose sum is σ = 32571461578752. Its totient is φ = 7449355900800.

The previous prime is 18190127640511. The next prime is 18190127640541. The reversal of 18190127640538 is 83504672109181.

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, 1636827670 + ... + 1636838782.

It is an arithmetic number, because the mean of its divisors is an integer number (508929087168).

It is a 1-persistent number, because it is pandigital, but 2⋅18190127640538 = 36380255281076 is not.

Almost surely, 2^{18190127640538} is an apocalyptic number.

18190127640538 is a deficient number, since it is larger than the sum of its proper divisors (14381333938214).

18190127640538 is a wasteful number, since it uses less digits than its factorization.

18190127640538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15779.

The product of its (nonzero) digits is 2903040, while the sum is 55.

The spelling of 18190127640538 in words is "eighteen trillion, one hundred ninety billion, one hundred twenty-seven million, six hundred forty thousand, five hundred thirty-eight".