1925778550691 has 2 divisors, whose sum is σ = 1925778550692. Its totient is φ = 1925778550690.

The previous prime is 1925778550499. The next prime is 1925778550693. The reversal of 1925778550691 is 1960558775291.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1925778550691 - 2¹⁴ = 1925778534307 is a prime.

Together with 1925778550693, 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 (1925778550693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 962889275345 + 962889275346.

It is an arithmetic number, because the mean of its divisors is an integer number (962889275346).

Almost surely, 2^{1925778550691} is an apocalyptic number.

1925778550691 is a deficient number, since it is larger than the sum of its proper divisors (1).

1925778550691 is an equidigital number, since it uses as much as digits as its factorization.

1925778550691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 47628000, while the sum is 65.

The spelling of 1925778550691 in words is "one trillion, nine hundred twenty-five billion, seven hundred seventy-eight million, five hundred fifty thousand, six hundred ninety-one".