2640026515 has 16 divisors (see below), whose sum is σ = 3654450432. Its totient is φ = 1793382624.

The previous prime is 2640026489. The next prime is 2640026533. The reversal of 2640026515 is 5156200462.

It is a cyclic number.

It is not a de Polignac number, because 2640026515 - 2¹⁵ = 2639993747 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 348729 + ... + 356218.

It is an arithmetic number, because the mean of its divisors is an integer number (228403152).

Almost surely, 2^2640026515 is an apocalyptic number.

2640026515 is a deficient number, since it is larger than the sum of its proper divisors (1014423917).

2640026515 is a wasteful number, since it uses less digits than its factorization.

2640026515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 705066.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 2640026515 is about 51381.1883377565. The cubic root of 2640026515 is about 1382.0892730037.

Adding to 2640026515 its reverse (5156200462), we get a palindrome (7796226977).

The spelling of 2640026515 in words is "two billion, six hundred forty million, twenty-six thousand, five hundred fifteen".