561111233950 has 12 divisors (see below), whose sum is σ = 1043666895240. Its totient is φ = 224444493560.

The previous prime is 561111233939. The next prime is 561111233951. The reversal of 561111233950 is 59332111165.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561111233951) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5611112290 + ... + 5611112389.

It is an arithmetic number, because the mean of its divisors is an integer number (86972241270).

Almost surely, 2^561111233950 is an apocalyptic number.

561111233950 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

561111233950 is a deficient number, since it is larger than the sum of its proper divisors (482555661290).

561111233950 is a wasteful number, since it uses less digits than its factorization.

561111233950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11222224691 (or 11222224686 counting only the distinct ones).

The product of its (nonzero) digits is 24300, while the sum is 37.

The spelling of 561111233950 in words is "five hundred sixty-one billion, one hundred eleven million, two hundred thirty-three thousand, nine hundred fifty".