1925778550567 has 4 divisors (see below), whose sum is σ = 1928993540400. Its totient is φ = 1922563560736.

The previous prime is 1925778550499. The next prime is 1925778550691. The reversal of 1925778550567 is 7650558775291.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1925778550567 - 2²⁷ = 1925644332839 is a prime.

It is a Smith number, since the sum of its digits (67) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1925778950567) 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 in 3 ways as a sum of consecutive naturals, for example, 1607494018 + ... + 1607495215.

It is an arithmetic number, because the mean of its divisors is an integer number (482248385100).

Almost surely, 2^{1925778550567} is an apocalyptic number.

1925778550567 is a deficient number, since it is larger than the sum of its proper divisors (3214989833).

1925778550567 is an equidigital number, since it uses as much as digits as its factorization.

1925778550567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3214989832.

The product of its (nonzero) digits is 185220000, while the sum is 67.

The spelling of 1925778550567 in words is "one trillion, nine hundred twenty-five billion, seven hundred seventy-eight million, five hundred fifty thousand, five hundred sixty-seven".