77947728383 has 12 divisors (see below), whose sum is σ = 91010981160. Its totient is φ = 66563954352.

The previous prime is 77947728379. The next prime is 77947728533. The reversal of 77947728383 is 38382774977.

It is not a de Polignac number, because 77947728383 - 2² = 77947728379 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77947728983) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2943641 + ... + 2970002.

It is an arithmetic number, because the mean of its divisors is an integer number (7584248430).

Almost surely, 2^77947728383 is an apocalyptic number.

77947728383 is a deficient number, since it is larger than the sum of its proper divisors (13063252777).

77947728383 is a wasteful number, since it uses less digits than its factorization.

77947728383 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5913926 (or 5913919 counting only the distinct ones).

The product of its digits is 99574272, while the sum is 65.

The spelling of 77947728383 in words is "seventy-seven billion, nine hundred forty-seven million, seven hundred twenty-eight thousand, three hundred eighty-three".