499321789257 has 16 divisors (see below), whose sum is σ = 688739042880. Its totient is φ = 321393508800.

The previous prime is 499321789237. The next prime is 499321789301. The reversal of 499321789257 is 752987123994.

It is a happy number.

It is not a de Polignac number, because 499321789257 - 2⁷ = 499321789129 is a prime.

It is a super-2 number, since 2×499321789257² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (499321789217) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4571907 + ... + 4679847.

It is an arithmetic number, because the mean of its divisors is an integer number (43046190180).

Almost surely, 2^499321789257 is an apocalyptic number.

It is an amenable number.

499321789257 is a deficient number, since it is larger than the sum of its proper divisors (189417253623).

499321789257 is a wasteful number, since it uses less digits than its factorization.

499321789257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161144.

The product of its digits is 68584320, while the sum is 66.

The spelling of 499321789257 in words is "four hundred ninety-nine billion, three hundred twenty-one million, seven hundred eighty-nine thousand, two hundred fifty-seven".