39978975585 has 16 divisors (see below), whose sum is σ = 66172098240. Its totient is φ = 20586874560.

The previous prime is 39978975583. The next prime is 39978975593. The reversal of 39978975585 is 58557987993.

39978975585 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 39978975585 - 2¹ = 39978975583 is a prime.

It is not an unprimeable number, because it can be changed into a prime (39978975583) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45952411 + ... + 45953280.

It is an arithmetic number, because the mean of its divisors is an integer number (4135756140).

Almost surely, 2^39978975585 is an apocalyptic number.

It is an amenable number.

39978975585 is a deficient number, since it is larger than the sum of its proper divisors (26193122655).

39978975585 is a wasteful number, since it uses less digits than its factorization.

39978975585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91905728.

The product of its digits is 857304000, while the sum is 75.

The spelling of 39978975585 in words is "thirty-nine billion, nine hundred seventy-eight million, nine hundred seventy-five thousand, five hundred eighty-five".