6457764561 has 8 divisors (see below), whose sum is σ = 8611362240. Its totient is φ = 4304671632.

The previous prime is 6457764559. The next prime is 6457764569. The reversal of 6457764561 is 1654677546.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6457764561 - 2¹ = 6457764559 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (6457764569) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95250 + ... + 148283.

It is an arithmetic number, because the mean of its divisors is an integer number (1076420280).

Almost surely, 2^6457764561 is an apocalyptic number.

It is an amenable number.

6457764561 is a deficient number, since it is larger than the sum of its proper divisors (2153597679).

6457764561 is a wasteful number, since it uses less digits than its factorization.

6457764561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252375.

The product of its digits is 4233600, while the sum is 51.

The square root of 6457764561 is about 80360.2175270824. The cubic root of 6457764561 is about 1862.2046314846.

The spelling of 6457764561 in words is "six billion, four hundred fifty-seven million, seven hundred sixty-four thousand, five hundred sixty-one".