505129758420 has 72 divisors (see below), whose sum is σ = 1645279794144. Its totient is φ = 115458229824.

The previous prime is 505129758409. The next prime is 505129758433. The reversal of 505129758420 is 24857921505.

It is a self number, because there is not a number n which added to its sum of digits gives 505129758420.

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, 85903482 + ... + 85909361.

It is an arithmetic number, because the mean of its divisors is an integer number (22851108252).

Almost surely, 2^505129758420 is an apocalyptic number.

It is an amenable number.

505129758420 is an abundant number, since it is smaller than the sum of its proper divisors (1140150035724).

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

505129758420 is a wasteful number, since it uses less digits than its factorization.

505129758420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171812869 (or 171812860 counting only the distinct ones).

The product of its (nonzero) digits is 1008000, while the sum is 48.

The spelling of 505129758420 in words is "five hundred five billion, one hundred twenty-nine million, seven hundred fifty-eight thousand, four hundred twenty".