497699899920 has 120 divisors (see below), whose sum is σ = 1672017984000. Its totient is φ = 132674251008.

The previous prime is 497699899919. The next prime is 497699899969. The reversal of 497699899920 is 29998996794.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (120).

It is a self number, because there is not a number n which added to its sum of digits gives 497699899920.

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, 1998481 + ... + 2233679.

It is an arithmetic number, because the mean of its divisors is an integer number (13933483200).

Almost surely, 2^497699899920 is an apocalyptic number.

497699899920 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

497699899920 is an abundant number, since it is smaller than the sum of its proper divisors (1174318084080).

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

497699899920 is a wasteful number, since it uses less digits than its factorization.

497699899920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238157 (or 238148 counting only the distinct ones).

The product of its (nonzero) digits is 1428513408, while the sum is 81.

The spelling of 497699899920 in words is "four hundred ninety-seven billion, six hundred ninety-nine million, eight hundred ninety-nine thousand, nine hundred twenty".