74778956983 has 2 divisors, whose sum is σ = 74778956984. Its totient is φ = 74778956982.

The previous prime is 74778956981. The next prime is 74778957017. The reversal of 74778956983 is 38965987747.

It is a weak prime.

It is an emirp because it is prime and its reverse (38965987747) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 74778956983 - 2¹ = 74778956981 is a prime.

Together with 74778956981, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74778956981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37389478491 + 37389478492.

It is an arithmetic number, because the mean of its divisors is an integer number (37389478492).

Almost surely, 2^74778956983 is an apocalyptic number.

74778956983 is a deficient number, since it is larger than the sum of its proper divisors (1).

74778956983 is an equidigital number, since it uses as much as digits as its factorization.

74778956983 is an evil number, because the sum of its binary digits is even.

The product of its digits is 640120320, while the sum is 73.

The spelling of 74778956983 in words is "seventy-four billion, seven hundred seventy-eight million, nine hundred fifty-six thousand, nine hundred eighty-three".