2078725805 has 8 divisors (see below), whose sum is σ = 2686353432. Its totient is φ = 1535059008.

The previous prime is 2078725783. The next prime is 2078725841. The reversal of 2078725805 is 5085278702.

It can be written as a sum of positive squares in 4 ways, for example, as 20016676 + 2058709129 = 4474^2 + 45373^2 .

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 2078725805 - 2¹⁸ = 2078463661 is a prime.

It is a super-2 number, since 2×2078725805² = 8642201944745796050, which contains 22 as substring.

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, 15990134 + ... + 15990263.

It is an arithmetic number, because the mean of its divisors is an integer number (335794179).

Almost surely, 2^2078725805 is an apocalyptic number.

It is an amenable number.

2078725805 is a deficient number, since it is larger than the sum of its proper divisors (607627627).

2078725805 is a wasteful number, since it uses less digits than its factorization.

2078725805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31980415.

The product of its (nonzero) digits is 313600, while the sum is 44.

The square root of 2078725805 is about 45593.0455771492. The cubic root of 2078725805 is about 1276.2401477117.

The spelling of 2078725805 in words is "two billion, seventy-eight million, seven hundred twenty-five thousand, eight hundred five".