499997550390 has 128 divisors (see below), whose sum is σ = 1348883407872. Its totient is φ = 117690693120.

The previous prime is 499997550383. The next prime is 499997550499. The reversal of 499997550390 is 93055799994.

It is a Harshad number since it is a multiple of its sum of digits (69).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 43597437 + ... + 43608903.

It is an arithmetic number, because the mean of its divisors is an integer number (10538151624).

Almost surely, 2^499997550390 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 499997550390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (674441703936).

499997550390 is an abundant number, since it is smaller than the sum of its proper divisors (848885857482).

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

499997550390 is a wasteful number, since it uses less digits than its factorization.

499997550390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16374.

The product of its (nonzero) digits is 124002900, while the sum is 69.

The spelling of 499997550390 in words is "four hundred ninety-nine billion, nine hundred ninety-seven million, five hundred fifty thousand, three hundred ninety".