2126778063 has 8 divisors (see below), whose sum is σ = 2838993408. Its totient is φ = 1416207384.

The previous prime is 2126778041. The next prime is 2126778097. The reversal of 2126778063 is 3608776212.

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

It is not a de Polignac number, because 2126778063 - 2¹⁰ = 2126777039 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2126778263) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 408145 + ... + 413322.

It is an arithmetic number, because the mean of its divisors is an integer number (354874176).

Almost surely, 2^2126778063 is an apocalyptic number.

2126778063 is a deficient number, since it is larger than the sum of its proper divisors (712215345).

2126778063 is an equidigital number, since it uses as much as digits as its factorization.

2126778063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 822333.

The product of its (nonzero) digits is 169344, while the sum is 42.

The square root of 2126778063 is about 46117.0040549037. The cubic root of 2126778063 is about 1285.9992758071. Note that the first 3 decimals are identical.

The spelling of 2126778063 in words is "two billion, one hundred twenty-six million, seven hundred seventy-eight thousand, sixty-three".