126856321615 has 8 divisors (see below), whose sum is σ = 152460710208. Its totient is φ = 101329641120.

The previous prime is 126856321601. The next prime is 126856321687. The reversal of 126856321615 is 516123658621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 126856321615 - 2¹¹ = 126856319567 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19423431 + ... + 19429960.

It is an arithmetic number, because the mean of its divisors is an integer number (19057588776).

Almost surely, 2^126856321615 is an apocalyptic number.

126856321615 is a deficient number, since it is larger than the sum of its proper divisors (25604388593).

126856321615 is an equidigital number, since it uses as much as digits as its factorization.

126856321615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38854049.

The product of its digits is 518400, while the sum is 46.

The spelling of 126856321615 in words is "one hundred twenty-six billion, eight hundred fifty-six million, three hundred twenty-one thousand, six hundred fifteen".