6456536261 has 4 divisors (see below), whose sum is σ = 7378898592. Its totient is φ = 5534173932.

The previous prime is 6456536237. The next prime is 6456536269. The reversal of 6456536261 is 1626356546.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1626356546 = 2 ⋅813178273.

It is not a de Polignac number, because 6456536261 - 2⁶ = 6456536197 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 (6456536269) 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, 461181155 + ... + 461181168.

It is an arithmetic number, because the mean of its divisors is an integer number (1844724648).

Almost surely, 2^6456536261 is an apocalyptic number.

It is an amenable number.

6456536261 is a deficient number, since it is larger than the sum of its proper divisors (922362331).

6456536261 is an equidigital number, since it uses as much as digits as its factorization.

6456536261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 922362330.

The product of its digits is 777600, while the sum is 44.

The square root of 6456536261 is about 80352.5747005035. The cubic root of 6456536261 is about 1862.0865570352.

The spelling of 6456536261 in words is "six billion, four hundred fifty-six million, five hundred thirty-six thousand, two hundred sixty-one".