6490434869 has 4 divisors (see below), whose sum is σ = 6537810444. Its totient is φ = 6443059296.

The previous prime is 6490434833. The next prime is 6490434911. The reversal of 6490434869 is 9684340946.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1806675025 + 4683759844 = 42505^2 + 68438^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6490434869 is a prime.

It is a super-2 number, since 2×6490434869² = 84251489577462094322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6490434869.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6490434829) 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, 23687582 + ... + 23687855.

It is an arithmetic number, because the mean of its divisors is an integer number (1634452611).

Almost surely, 2^6490434869 is an apocalyptic number.

It is an amenable number.

6490434869 is a deficient number, since it is larger than the sum of its proper divisors (47375575).

6490434869 is a wasteful number, since it uses less digits than its factorization.

6490434869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47375574.

The product of its (nonzero) digits is 4478976, while the sum is 53.

The square root of 6490434869 is about 80563.2352192984. The cubic root of 6490434869 is about 1865.3396941775.

The spelling of 6490434869 in words is "six billion, four hundred ninety million, four hundred thirty-four thousand, eight hundred sixty-nine".