123022435540 has 12 divisors (see below), whose sum is σ = 258347114676. Its totient is φ = 49208974208.

The previous prime is 123022435531. The next prime is 123022435541. The reversal of 123022435540 is 45534220321.

It can be written as a sum of positive squares in 2 ways, for example, as 87607712196 + 35414723344 = 295986^2 + 188188^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123022435541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3075560869 + ... + 3075560908.

It is an arithmetic number, because the mean of its divisors is an integer number (21528926223).

Almost surely, 2^123022435540 is an apocalyptic number.

123022435540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123022435540 is an abundant number, since it is smaller than the sum of its proper divisors (135324679136).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123022435540 is a wasteful number, since it uses less digits than its factorization.

123022435540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6151121786 (or 6151121784 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 31.

Adding to 123022435540 its reverse (45534220321), we get a palindrome (168556655861).

The spelling of 123022435540 in words is "one hundred twenty-three billion, twenty-two million, four hundred thirty-five thousand, five hundred forty".