126722516515 has 16 divisors (see below), whose sum is σ = 174144856320. Its totient is φ = 86718451680.

The previous prime is 126722516497. The next prime is 126722516537. The reversal of 126722516515 is 515615227621.

It is not a de Polignac number, because 126722516515 - 2¹³ = 126722508323 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3669825 + ... + 3704194.

It is an arithmetic number, because the mean of its divisors is an integer number (10884053520).

Almost surely, 2^126722516515 is an apocalyptic number.

126722516515 is a deficient number, since it is larger than the sum of its proper divisors (47422339805).

126722516515 is an equidigital number, since it uses as much as digits as its factorization.

126722516515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7374522.

The product of its digits is 252000, while the sum is 43.

The spelling of 126722516515 in words is "one hundred twenty-six billion, seven hundred twenty-two million, five hundred sixteen thousand, five hundred fifteen".