61622251261220 has 96 divisors (see below), whose sum is σ = 140658844225536. Its totient is φ = 22541464512000.

The previous prime is 61622251261139. The next prime is 61622251261223. The reversal of 61622251261220 is 2216215222616.

It is not an unprimeable number, because it can be changed into a prime (61622251261223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21815915 + ... + 24478125.

It is an arithmetic number, because the mean of its divisors is an integer number (1465196294016).

Almost surely, 2^{61622251261220} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61622251261220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70329422112768).

61622251261220 is an abundant number, since it is smaller than the sum of its proper divisors (79036592964316).

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

61622251261220 is a wasteful number, since it uses less digits than its factorization.

61622251261220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2663061 (or 2663059 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 38.

Adding to 61622251261220 its reverse (2216215222616), we get a palindrome (63838466483836).

The spelling of 61622251261220 in words is "sixty-one trillion, six hundred twenty-two billion, two hundred fifty-one million, two hundred sixty-one thousand, two hundred twenty".