501990408500 has 96 divisors (see below), whose sum is σ = 1283528623104. Its totient is φ = 167913120000.

The previous prime is 501990408497. The next prime is 501990408527. The reversal of 501990408500 is 5804099105.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1605596 + ... + 1892595.

It is an arithmetic number, because the mean of its divisors is an integer number (13370089824).

Almost surely, 2^501990408500 is an apocalyptic number.

501990408500 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

501990408500 is an abundant number, since it is smaller than the sum of its proper divisors (781538214604).

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

501990408500 is a wasteful number, since it uses less digits than its factorization.

501990408500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3498258 (or 3498246 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 41.

The spelling of 501990408500 in words is "five hundred one billion, nine hundred ninety million, four hundred eight thousand, five hundred".