39197966642 has 8 divisors (see below), whose sum is σ = 58886993196. Its totient is φ = 19568968912.

The previous prime is 39197966641. The next prime is 39197966651. The reversal of 39197966642 is 24666979193.

It can be written as a sum of positive squares in 2 ways, for example, as 39133148041 + 64818601 = 197821^2 + 8051^2 .

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

It is not an unprimeable number, because it can be changed into a prime (39197966641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15005573 + ... + 15008184.

Almost surely, 2^39197966642 is an apocalyptic number.

39197966642 is a deficient number, since it is larger than the sum of its proper divisors (19689026554).

39197966642 is a wasteful number, since it uses less digits than its factorization.

39197966642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30014412.

The product of its digits is 26453952, while the sum is 62.

The spelling of 39197966642 in words is "thirty-nine billion, one hundred ninety-seven million, nine hundred sixty-six thousand, six hundred forty-two".