6503470649 has 16 divisors (see below), whose sum is σ = 7616156688. Its totient is φ = 5497362432.

The previous prime is 6503470619. The next prime is 6503470667. The reversal of 6503470649 is 9460743056.

It can be written as a sum of positive squares in 8 ways, for example, as 652291600 + 5851179049 = 25540^2 + 76493^2 .

It is a cyclic number.

It is not a de Polignac number, because 6503470649 - 2¹² = 6503466553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6503470609) 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, 389492 + ... + 405845.

It is an arithmetic number, because the mean of its divisors is an integer number (476009793).

Almost surely, 2^6503470649 is an apocalyptic number.

It is an amenable number.

6503470649 is a deficient number, since it is larger than the sum of its proper divisors (1112686039).

6503470649 is a wasteful number, since it uses less digits than its factorization.

6503470649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 795404.

The product of its (nonzero) digits is 544320, while the sum is 44.

The square root of 6503470649 is about 80644.0986619604. The cubic root of 6503470649 is about 1866.5876792080.

The spelling of 6503470649 in words is "six billion, five hundred three million, four hundred seventy thousand, six hundred forty-nine".