61220140620 has 24 divisors (see below), whose sum is σ = 171416393904. Its totient is φ = 16325370816.

The previous prime is 61220140613. The next prime is 61220140621. The reversal of 61220140620 is 2604102216.

It is not an unprimeable number, because it can be changed into a prime (61220140621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 510167779 + ... + 510167898.

It is an arithmetic number, because the mean of its divisors is an integer number (7142349746).

Almost surely, 2^61220140620 is an apocalyptic number.

61220140620 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61220140620 is an abundant number, since it is smaller than the sum of its proper divisors (110196253284).

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

61220140620 is a wasteful number, since it uses less digits than its factorization.

61220140620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1020335689 (or 1020335687 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 61220140620 its reverse (2604102216), we get a palindrome (63824242836).

The spelling of 61220140620 in words is "sixty-one billion, two hundred twenty million, one hundred forty thousand, six hundred twenty".