7939877983491 has 8 divisors (see below), whose sum is σ = 10586606782480. Its totient is φ = 5293200586752.

The previous prime is 7939877983489. The next prime is 7939877983523. The reversal of 7939877983491 is 1943897789397.

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

It is not a de Polignac number, because 7939877983491 - 2¹ = 7939877983489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7939877983421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12488686 + ... + 13109043.

It is an arithmetic number, because the mean of its divisors is an integer number (1323325847810).

Almost surely, 2^{7939877983491} is an apocalyptic number.

7939877983491 is a deficient number, since it is larger than the sum of its proper divisors (2646728798989).

7939877983491 is a wasteful number, since it uses less digits than its factorization.

7939877983491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25701125.

The product of its digits is 5184974592, while the sum is 84.

The spelling of 7939877983491 in words is "seven trillion, nine hundred thirty-nine billion, eight hundred seventy-seven million, nine hundred eighty-three thousand, four hundred ninety-one".