2978782559 has 8 divisors (see below), whose sum is σ = 3051052752. Its totient is φ = 2906648640.

The previous prime is 2978782537. The next prime is 2978782607. The reversal of 2978782559 is 9552878792.

It is a happy number.

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

It is not a de Polignac number, because 2978782559 - 2¹² = 2978778463 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2978782519) 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, 10889 + ... + 77949.

It is an arithmetic number, because the mean of its divisors is an integer number (381381594).

Almost surely, 2^2978782559 is an apocalyptic number.

2978782559 is a deficient number, since it is larger than the sum of its proper divisors (72270193).

2978782559 is a wasteful number, since it uses less digits than its factorization.

2978782559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68137.

The product of its digits is 25401600, while the sum is 62.

The square root of 2978782559 is about 54578.2242199213. The cubic root of 2978782559 is about 1438.8414290569.

The spelling of 2978782559 in words is "two billion, nine hundred seventy-eight million, seven hundred eighty-two thousand, five hundred fifty-nine".