561778339 has 8 divisors (see below), whose sum is σ = 592130000. Its totient is φ = 531505152.

The previous prime is 561778337. The next prime is 561778361. The reversal of 561778339 is 933877165.

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 561778339 - 2¹ = 561778337 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 561778292 and 561778301.

It is not an unprimeable number, because it can be changed into a prime (561778331) 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, 4614 + ... + 33835.

It is an arithmetic number, because the mean of its divisors is an integer number (74016250).

Almost surely, 2^561778339 is an apocalyptic number.

561778339 is a deficient number, since it is larger than the sum of its proper divisors (30351661).

561778339 is a wasteful number, since it uses less digits than its factorization.

561778339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39237.

The product of its digits is 952560, while the sum is 49.

The square root of 561778339 is about 23701.8636187115. The cubic root of 561778339 is about 825.1286430555.

It can be divided in two parts, 56177 and 8339, that added together give a square (64516 = 254²).

The spelling of 561778339 in words is "five hundred sixty-one million, seven hundred seventy-eight thousand, three hundred thirty-nine".