1656794946979 has 2 divisors, whose sum is σ = 1656794946980. Its totient is φ = 1656794946978.

The previous prime is 1656794946977. The next prime is 1656794947033. The reversal of 1656794946979 is 9796494976561.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1656794946979 - 2¹ = 1656794946977 is a prime.

Together with 1656794946977, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1656794946977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 828397473489 + 828397473490.

It is an arithmetic number, because the mean of its divisors is an integer number (828397473490).

Almost surely, 2^{1656794946979} is an apocalyptic number.

1656794946979 is a deficient number, since it is larger than the sum of its proper divisors (1).

1656794946979 is an equidigital number, since it uses as much as digits as its factorization.

1656794946979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5555329920, while the sum is 82.

The spelling of 1656794946979 in words is "one trillion, six hundred fifty-six billion, seven hundred ninety-four million, nine hundred forty-six thousand, nine hundred seventy-nine".