1925778550506 has 128 divisors (see below), whose sum is σ = 4142634762240. Its totient is φ = 595471430400.

The previous prime is 1925778550499. The next prime is 1925778550691. The reversal of 1925778550506 is 6050558775291.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1925778550506.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 1029276751 + ... + 1029278621.

It is an arithmetic number, because the mean of its divisors is an integer number (32364334080).

Almost surely, 2^{1925778550506} is an apocalyptic number.

1925778550506 is an abundant number, since it is smaller than the sum of its proper divisors (2216856211734).

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

1925778550506 is a wasteful number, since it uses less digits than its factorization.

1925778550506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3212.

The product of its (nonzero) digits is 26460000, while the sum is 60.

The spelling of 1925778550506 in words is "one trillion, nine hundred twenty-five billion, seven hundred seventy-eight million, five hundred fifty thousand, five hundred six".