39976642799 has 2 divisors, whose sum is σ = 39976642800. Its totient is φ = 39976642798.

The previous prime is 39976642697. The next prime is 39976642801. The reversal of 39976642799 is 99724667993.

It is a strong prime.

It is an emirp because it is prime and its reverse (99724667993) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39976642799 is a prime.

Together with 39976642801, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39976641799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19988321399 + 19988321400.

It is an arithmetic number, because the mean of its divisors is an integer number (19988321400).

Almost surely, 2^39976642799 is an apocalyptic number.

39976642799 is a deficient number, since it is larger than the sum of its proper divisors (1).

39976642799 is an equidigital number, since it uses as much as digits as its factorization.

39976642799 is an evil number, because the sum of its binary digits is even.

The product of its digits is 277766496, while the sum is 71.

The spelling of 39976642799 in words is "thirty-nine billion, nine hundred seventy-six million, six hundred forty-two thousand, seven hundred ninety-nine".