1925778550566 has 32 divisors (see below), whose sum is σ = 4149795944448. Its totient is φ = 592266500640.

The previous prime is 1925778550499. The next prime is 1925778550691. The reversal of 1925778550566 is 6650558775291.

It is a junction number, because it is equal to n+sod(n) for n = 1925778550497 and 1925778550506.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5683156 + ... + 6012471.

It is an arithmetic number, because the mean of its divisors is an integer number (129681123264).

Almost surely, 2^{1925778550566} is an apocalyptic number.

1925778550566 is an abundant number, since it is smaller than the sum of its proper divisors (2224017393882).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1925778550566 is a wasteful number, since it uses less digits than its factorization.

1925778550566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11697756.

The product of its (nonzero) digits is 158760000, while the sum is 66.

The spelling of 1925778550566 in words is "one trillion, nine hundred twenty-five billion, seven hundred seventy-eight million, five hundred fifty thousand, five hundred sixty-six".