6472261538 has 18 divisors (see below), whose sum is σ = 9796388049. Its totient is φ = 3207061512.

The previous prime is 6472261501. The next prime is 6472261547. The reversal of 6472261538 is 8351622746.

It can be written as a sum of positive squares in 2 ways, for example, as 6096017929 + 376243609 = 78077^2 + 19397^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=56887.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 18544988 + ... + 18545336.

Almost surely, 2^6472261538 is an apocalyptic number.

6472261538 is a deficient number, since it is larger than the sum of its proper divisors (3324126511).

6472261538 is an frugal number, since it uses more digits than its factorization.

6472261538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1026 (or 514 counting only the distinct ones).

The product of its digits is 483840, while the sum is 44.

The square root of 6472261538 is about 80450.3669227183. The cubic root of 6472261538 is about 1863.5970721316.

The spelling of 6472261538 in words is "six billion, four hundred seventy-two million, two hundred sixty-one thousand, five hundred thirty-eight".