490618764509 has 4 divisors (see below), whose sum is σ = 497941432704. Its totient is φ = 483296096316.

The previous prime is 490618764451. The next prime is 490618764551. The reversal of 490618764509 is 905467816094.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 490618764509 - 2¹² = 490618760413 is a prime.

It is a super-2 number, since 2×490618764509² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (490618764109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3661333997 + ... + 3661334130.

It is an arithmetic number, because the mean of its divisors is an integer number (124485358176).

Almost surely, 2^490618764509 is an apocalyptic number.

It is an amenable number.

490618764509 is a deficient number, since it is larger than the sum of its proper divisors (7322668195).

490618764509 is an equidigital number, since it uses as much as digits as its factorization.

490618764509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7322668194.

The product of its (nonzero) digits is 13063680, while the sum is 59.

The spelling of 490618764509 in words is "four hundred ninety billion, six hundred eighteen million, seven hundred sixty-four thousand, five hundred nine".