505053778 has 16 divisors (see below), whose sum is σ = 763690176. Its totient is φ = 250497360.

The previous prime is 505053761. The next prime is 505053779. The reversal of 505053778 is 877350505.

It is a self number, because there is not a number n which added to its sum of digits gives 505053778.

It is not an unprimeable number, because it can be changed into a prime (505053779) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 179563 + ... + 182353.

It is an arithmetic number, because the mean of its divisors is an integer number (47730636).

Almost surely, 2^505053778 is an apocalyptic number.

505053778 is a deficient number, since it is larger than the sum of its proper divisors (258636398).

505053778 is a wasteful number, since it uses less digits than its factorization.

505053778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3489.

The product of its (nonzero) digits is 147000, while the sum is 40.

The square root of 505053778 is about 22473.4015671860. The cubic root of 505053778 is about 796.3656907888.

The spelling of 505053778 in words is "five hundred five million, fifty-three thousand, seven hundred seventy-eight".