505121388388 has 12 divisors (see below), whose sum is σ = 889592764732. Its totient is φ = 250952027040.

The previous prime is 505121388379. The next prime is 505121388403. The reversal of 505121388388 is 883883121505.

It can be written as a sum of positive squares in 2 ways, for example, as 61488129024 + 443633259364 = 247968^2 + 666058^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 402166083 + ... + 402167338.

Almost surely, 2^505121388388 is an apocalyptic number.

It is an amenable number.

505121388388 is a deficient number, since it is larger than the sum of its proper divisors (384471376344).

505121388388 is a wasteful number, since it uses less digits than its factorization.

505121388388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 804333582 (or 804333580 counting only the distinct ones).

The product of its (nonzero) digits is 1843200, while the sum is 52.

The spelling of 505121388388 in words is "five hundred five billion, one hundred twenty-one million, three hundred eighty-eight thousand, three hundred eighty-eight".