61550230240 has 24 divisors (see below), whose sum is σ = 145412419320. Its totient is φ = 24620092032.

The previous prime is 61550230201. The next prime is 61550230267. The reversal of 61550230240 is 4203205516.

It is a junction number, because it is equal to n+sod(n) for n = 61550230199 and 61550230208.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 192344310 + ... + 192344629.

It is an arithmetic number, because the mean of its divisors is an integer number (6058850805).

Almost surely, 2^61550230240 is an apocalyptic number.

It is an amenable number.

61550230240 is an abundant number, since it is smaller than the sum of its proper divisors (83862189080).

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

61550230240 is a wasteful number, since it uses less digits than its factorization.

61550230240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384688954 (or 384688946 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

Adding to 61550230240 its reverse (4203205516), we get a palindrome (65753435756).

The spelling of 61550230240 in words is "sixty-one billion, five hundred fifty million, two hundred thirty thousand, two hundred forty".