1261643202230 has 16 divisors (see below), whose sum is σ = 2273941953504. Its totient is φ = 503994127680.

The previous prime is 1261643202139. The next prime is 1261643202263. The reversal of 1261643202230 is 322023461621.

It is a Curzon 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, 82886162 + ... + 82901381.

It is an arithmetic number, because the mean of its divisors is an integer number (142121372094).

Almost surely, 2^{1261643202230} is an apocalyptic number.

1261643202230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1261643202230 is a deficient number, since it is larger than the sum of its proper divisors (1012298751274).

1261643202230 is a wasteful number, since it uses less digits than its factorization.

1261643202230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165788311.

The product of its (nonzero) digits is 20736, while the sum is 32.

Adding to 1261643202230 its reverse (322023461621), we get a palindrome (1583666663851).

The spelling of 1261643202230 in words is "one trillion, two hundred sixty-one billion, six hundred forty-three million, two hundred two thousand, two hundred thirty".