1904955669779 has 2 divisors, whose sum is σ = 1904955669780. Its totient is φ = 1904955669778.

The previous prime is 1904955669679. The next prime is 1904955669781. The reversal of 1904955669779 is 9779665594091.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1904955669779 - 2¹⁶ = 1904955604243 is a prime.

It is a super-2 number, since 2×1904955669779² (a number of 25 digits) contains 22 as substring.

Together with 1904955669781, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1904955669079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 952477834889 + 952477834890.

It is an arithmetic number, because the mean of its divisors is an integer number (952477834890).

Almost surely, 2^{1904955669779} is an apocalyptic number.

1904955669779 is a deficient number, since it is larger than the sum of its proper divisors (1).

1904955669779 is an equidigital number, since it uses as much as digits as its factorization.

1904955669779 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1157360400, while the sum is 77.

The spelling of 1904955669779 in words is "one trillion, nine hundred four billion, nine hundred fifty-five million, six hundred sixty-nine thousand, seven hundred seventy-nine".