6451265515 has 16 divisors (see below), whose sum is σ = 8198684928. Its totient is φ = 4862933856.

The previous prime is 6451265501. The next prime is 6451265539. The reversal of 6451265515 is 5155621546.

It is a cyclic number.

It is not a de Polignac number, because 6451265515 - 2¹⁵ = 6451232747 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 410937 + ... + 426346.

It is an arithmetic number, because the mean of its divisors is an integer number (512417808).

Almost surely, 2^6451265515 is an apocalyptic number.

6451265515 is a deficient number, since it is larger than the sum of its proper divisors (1747419413).

6451265515 is a wasteful number, since it uses less digits than its factorization.

6451265515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 837378.

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

The square root of 6451265515 is about 80319.7703868730. The cubic root of 6451265515 is about 1861.5797188599.

The spelling of 6451265515 in words is "six billion, four hundred fifty-one million, two hundred sixty-five thousand, five hundred fifteen".