126778632815 has 8 divisors (see below), whose sum is σ = 152683582560. Its totient is φ = 101056757472.

The previous prime is 126778632803. The next prime is 126778632919. The reversal of 126778632815 is 518236877621.

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

It is a cyclic number.

It is not a de Polignac number, because 126778632815 - 2⁸ = 126778632559 is a prime.

It is a congruent 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 7 ways as a sum of consecutive naturals, for example, 45767075 + ... + 45769844.

It is an arithmetic number, because the mean of its divisors is an integer number (19085447820).

Almost surely, 2^126778632815 is an apocalyptic number.

126778632815 is a deficient number, since it is larger than the sum of its proper divisors (25904949745).

126778632815 is an equidigital number, since it uses as much as digits as its factorization.

126778632815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91537201.

The product of its digits is 6773760, while the sum is 56.

The spelling of 126778632815 in words is "one hundred twenty-six billion, seven hundred seventy-eight million, six hundred thirty-two thousand, eight hundred fifteen".