39971500205 has 16 divisors (see below), whose sum is σ = 59034831744. Its totient is φ = 25300641600.

The previous prime is 39971500193. The next prime is 39971500207. The reversal of 39971500205 is 50200517993.

It is not a de Polignac number, because 39971500205 - 2¹⁴ = 39971483821 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39971500207) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 43924271 + ... + 43925180.

It is an arithmetic number, because the mean of its divisors is an integer number (3689676984).

Almost surely, 2^39971500205 is an apocalyptic number.

39971500205 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

39971500205 is a deficient number, since it is larger than the sum of its proper divisors (19063331539).

39971500205 is a wasteful number, since it uses less digits than its factorization.

39971500205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87849476.

The product of its (nonzero) digits is 85050, while the sum is 41.

The spelling of 39971500205 in words is "thirty-nine billion, nine hundred seventy-one million, five hundred thousand, two hundred five".