61506416220 has 24 divisors (see below), whose sum is σ = 172217965584. Its totient is φ = 16401710976.

The previous prime is 61506416203. The next prime is 61506416221. The reversal of 61506416220 is 2261460516.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61506416221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 512553409 + ... + 512553528.

It is an arithmetic number, because the mean of its divisors is an integer number (7175748566).

Almost surely, 2^61506416220 is an apocalyptic number.

61506416220 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61506416220 is an abundant number, since it is smaller than the sum of its proper divisors (110711549364).

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

61506416220 is a wasteful number, since it uses less digits than its factorization.

61506416220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1025106949 (or 1025106947 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

Adding to 61506416220 its reverse (2261460516), we get a palindrome (63767876736).

The spelling of 61506416220 in words is "sixty-one billion, five hundred six million, four hundred sixteen thousand, two hundred twenty".