61203783220 has 12 divisors (see below), whose sum is σ = 128527944804. Its totient is φ = 24481513280.

The previous prime is 61203783203. The next prime is 61203783229. The reversal of 61203783220 is 2238730216.

It can be written as a sum of positive squares in 2 ways, for example, as 26408850064 + 34794933156 = 162508^2 + 186534^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61203783229) 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, 1530094561 + ... + 1530094600.

It is an arithmetic number, because the mean of its divisors is an integer number (10710662067).

Almost surely, 2^61203783220 is an apocalyptic number.

It is an amenable number.

61203783220 is an abundant number, since it is smaller than the sum of its proper divisors (67324161584).

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

61203783220 is a wasteful number, since it uses less digits than its factorization.

61203783220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3060189170 (or 3060189168 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 34.

The spelling of 61203783220 in words is "sixty-one billion, two hundred three million, seven hundred eighty-three thousand, two hundred twenty".