72647488471138 has 64 divisors (see below), whose sum is σ = 125451691971840. Its totient is φ = 30907264405248.

The previous prime is 72647488471127. The next prime is 72647488471153. The reversal of 72647488471138 is 83117488474627.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1911907956 + ... + 1911945952.

It is an arithmetic number, because the mean of its divisors is an integer number (1960182687060).

Almost surely, 2^{72647488471138} is an apocalyptic number.

72647488471138 is a deficient number, since it is larger than the sum of its proper divisors (52804203500702).

72647488471138 is a wasteful number, since it uses less digits than its factorization.

72647488471138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39979.

The product of its digits is 404619264, while the sum is 70.

The spelling of 72647488471138 in words is "seventy-two trillion, six hundred forty-seven billion, four hundred eighty-eight million, four hundred seventy-one thousand, one hundred thirty-eight".