123412561850 has 12 divisors (see below), whose sum is σ = 229547365134. Its totient is φ = 49365024720.

The previous prime is 123412561819. The next prime is 123412561901. The reversal of 123412561850 is 58165214321.

It can be written as a sum of positive squares in 3 ways, for example, as 115667329801 + 7745232049 = 340099^2 + 88007^2 .

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1234125569 + ... + 1234125668.

Almost surely, 2^123412561850 is an apocalyptic number.

123412561850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

123412561850 is a deficient number, since it is larger than the sum of its proper divisors (106134803284).

123412561850 is a wasteful number, since it uses less digits than its factorization.

123412561850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2468251249 (or 2468251244 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 38.

The spelling of 123412561850 in words is "one hundred twenty-three billion, four hundred twelve million, five hundred sixty-one thousand, eight hundred fifty".