6493915261 has 4 divisors (see below), whose sum is σ = 6576116800. Its totient is φ = 6411713724.

The previous prime is 6493915231. The next prime is 6493915283. The reversal of 6493915261 is 1625193946.

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 6493915261 - 2¹⁹ = 6493390973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6493915231) 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, 41100651 + ... + 41100808.

It is an arithmetic number, because the mean of its divisors is an integer number (1644029200).

Almost surely, 2^6493915261 is an apocalyptic number.

It is an amenable number.

6493915261 is a deficient number, since it is larger than the sum of its proper divisors (82201539).

6493915261 is an equidigital number, since it uses as much as digits as its factorization.

6493915261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82201538.

The product of its digits is 349920, while the sum is 46.

The square root of 6493915261 is about 80584.8326982193. The cubic root of 6493915261 is about 1865.6730541344.

It can be divided in two parts, 64939 and 15261, that added together give a triangular number (80200 = T₄₀₀).

The spelling of 6493915261 in words is "six billion, four hundred ninety-three million, nine hundred fifteen thousand, two hundred sixty-one".