497389955840 has 72 divisors (see below), whose sum is σ = 1191804482400. Its totient is φ = 198889168896.

The previous prime is 497389955837. The next prime is 497389955857. The reversal of 497389955840 is 48559983794.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3838997 + ... + 3966443.

Almost surely, 2^497389955840 is an apocalyptic number.

497389955840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 497389955840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (595902241200).

497389955840 is an abundant number, since it is smaller than the sum of its proper divisors (694414526560).

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

497389955840 is a wasteful number, since it uses less digits than its factorization.

497389955840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130517 (or 130503 counting only the distinct ones).

The product of its (nonzero) digits is 391910400, while the sum is 71.

The spelling of 497389955840 in words is "four hundred ninety-seven billion, three hundred eighty-nine million, nine hundred fifty-five thousand, eight hundred forty".