39978473585 has 8 divisors (see below), whose sum is σ = 47978260200. Its totient is φ = 31980050944.

The previous prime is 39978473543. The next prime is 39978473599. The reversal of 39978473585 is 58537487993.

39978473585 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 13383713344 + 26594760241 = 115688^2 + 163079^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 39978473585 - 2¹⁶ = 39978408049 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 275360 + ... + 394689.

It is an arithmetic number, because the mean of its divisors is an integer number (5997282525).

Almost surely, 2^39978473585 is an apocalyptic number.

It is an amenable number.

39978473585 is a deficient number, since it is larger than the sum of its proper divisors (7999786615).

39978473585 is a wasteful number, since it uses less digits than its factorization.

39978473585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 681987.

The product of its digits is 228614400, while the sum is 68.

The spelling of 39978473585 in words is "thirty-nine billion, nine hundred seventy-eight million, four hundred seventy-three thousand, five hundred eighty-five".