6515126455 has 4 divisors (see below), whose sum is σ = 7818151752. Its totient is φ = 5212101160.

The previous prime is 6515126437. The next prime is 6515126459. The reversal of 6515126455 is 5546215156.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-6515126455 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 (6515126459) 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, 651512641 + ... + 651512650.

It is an arithmetic number, because the mean of its divisors is an integer number (1954537938).

Almost surely, 2^6515126455 is an apocalyptic number.

6515126455 is a deficient number, since it is larger than the sum of its proper divisors (1303025297).

6515126455 is a wasteful number, since it uses less digits than its factorization.

6515126455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1303025296.

The product of its digits is 180000, while the sum is 40.

The square root of 6515126455 is about 80716.3332603755. Note that the first 3 decimals coincide. The cubic root of 6515126455 is about 1867.7021405097.

The spelling of 6515126455 in words is "six billion, five hundred fifteen million, one hundred twenty-six thousand, four hundred fifty-five".