85825777550 has 48 divisors (see below), whose sum is σ = 169392140352. Its totient is φ = 32240947200.

The previous prime is 85825777549. The next prime is 85825777561. The reversal of 85825777550 is 5577752858.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 85825777550.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 284510 + ... + 502590.

It is an arithmetic number, because the mean of its divisors is an integer number (3529002924).

Almost surely, 2^85825777550 is an apocalyptic number.

85825777550 is a deficient number, since it is larger than the sum of its proper divisors (83566362802).

85825777550 is a wasteful number, since it uses less digits than its factorization.

85825777550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218573 (or 218568 counting only the distinct ones).

The product of its (nonzero) digits is 27440000, while the sum is 59.

The spelling of 85825777550 in words is "eighty-five billion, eight hundred twenty-five million, seven hundred seventy-seven thousand, five hundred fifty".