2085736778 has 4 divisors (see below), whose sum is σ = 3128605170. Its totient is φ = 1042868388.

The previous prime is 2085736747. The next prime is 2085736781. The reversal of 2085736778 is 8776375802.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1757873329 + 327863449 = 41927^2 + 18107^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 521434193 + ... + 521434196.

Almost surely, 2^2085736778 is an apocalyptic number.

2085736778 is a deficient number, since it is larger than the sum of its proper divisors (1042868392).

2085736778 is a wasteful number, since it uses less digits than its factorization.

2085736778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1042868391.

The product of its (nonzero) digits is 3951360, while the sum is 53.

The square root of 2085736778 is about 45669.8672868665. The cubic root of 2085736778 is about 1277.6733405259.

The spelling of 2085736778 in words is "two billion, eighty-five million, seven hundred thirty-six thousand, seven hundred seventy-eight".