6457117545 has 24 divisors (see below), whose sum is σ = 11345662536. Its totient is φ = 3396619008.

The previous prime is 6457117517. The next prime is 6457117577. The reversal of 6457117545 is 5457117546.

6457117545 is a `hidden beast` number, since 6 + 4 + 571 + 1 + 75 + 4 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 171164889 + 6285952656 = 13083^2 + 79284^2 .

It is not a de Polignac number, because 6457117545 - 2¹⁰ = 6457116521 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 6457117545.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 979534 + ... + 986103.

It is an arithmetic number, because the mean of its divisors is an integer number (472735939).

Almost surely, 2^6457117545 is an apocalyptic number.

It is an amenable number.

6457117545 is a deficient number, since it is larger than the sum of its proper divisors (4888544991).

6457117545 is a wasteful number, since it uses less digits than its factorization.

6457117545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1965721 (or 1965718 counting only the distinct ones).

The product of its digits is 588000, while the sum is 45.

The square root of 6457117545 is about 80356.1917029422. The cubic root of 6457117545 is about 1862.1424367720.

Subtracting from 6457117545 its reverse (5457117546), we obtain a palindrome (999999999).

The spelling of 6457117545 in words is "six billion, four hundred fifty-seven million, one hundred seventeen thousand, five hundred forty-five".