505645956420 has 48 divisors (see below), whose sum is σ = 1544518559808. Its totient is φ = 122580837760.

The previous prime is 505645956397. The next prime is 505645956479. The reversal of 505645956420 is 24659546505.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 383064459 + ... + 383065778.

It is an arithmetic number, because the mean of its divisors is an integer number (32177469996).

Almost surely, 2^505645956420 is an apocalyptic number.

It is an amenable number.

505645956420 is an abundant number, since it is smaller than the sum of its proper divisors (1038872603388).

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

505645956420 is a wasteful number, since it uses less digits than its factorization.

505645956420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 766130260 (or 766130258 counting only the distinct ones).

The product of its (nonzero) digits is 6480000, while the sum is 51.

The spelling of 505645956420 in words is "five hundred five billion, six hundred forty-five million, nine hundred fifty-six thousand, four hundred twenty".