611231540540 has 24 divisors (see below), whose sum is σ = 1283949696960. Its totient is φ = 244423385408.

The previous prime is 611231540509. The next prime is 611231540561. The reversal of 611231540540 is 45045132116.

It is a junction number, because it is equal to n+sod(n) for n = 611231540497 and 611231540506.

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, 4254500 + ... + 4395819.

It is an arithmetic number, because the mean of its divisors is an integer number (53497904040).

Almost surely, 2^611231540540 is an apocalyptic number.

It is an amenable number.

611231540540 is an abundant number, since it is smaller than the sum of its proper divisors (672718156420).

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

611231540540 is a wasteful number, since it uses less digits than its factorization.

611231540540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8653861 (or 8653859 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 32.

Adding to 611231540540 its reverse (45045132116), we get a palindrome (656276672656).

The spelling of 611231540540 in words is "six hundred eleven billion, two hundred thirty-one million, five hundred forty thousand, five hundred forty".